=Paper= {{Paper |id=Vol-2731/paper03 |storemode=property |title=Using augmented reality tools in the teaching of two-dimensional plane geometry |pdfUrl=https://ceur-ws.org/Vol-2731/paper03.pdf |volume=Vol-2731 |authors=Natalya V. Rashevska,Serhiy O. Semerikov,Natalya O. Zinonos,Viktoriia V. Tkachuk,Mariya P. Shyshkina |dblpUrl=https://dblp.org/rec/conf/aredu/RashevskaSZTS20 }} ==Using augmented reality tools in the teaching of two-dimensional plane geometry== https://ceur-ws.org/Vol-2731/paper03.pdf
                                                                                                79


    Using augmented reality tools in the teaching of two-
              dimensional plane geometry

   Natalya V. Rashevska1[0000-0001-6431-2503], Serhiy O. Semerikov1,2,3[0000-0003-0789-0272],
   Natalya O. Zinonos1[0000-0003-2159-1295], Viktoriia V. Tkachuk1[0000-0002-5879-5147] and
                       Mariya P. Shyshkina3[0000-0001-5569-2700]
   1 Kryvyi Rih National University, 11 Vitalii Matusevich Str., Kryvyi Rih, 50027, Ukraine

      {nvr1701, natalyazinonos, viktoriya.tkachuk}@knu.edu.ua
   2 Kryvyi Rih State Pedagogical University, 54 Gagarin Ave., Kryvyi Rih, 50086, Ukraine

                                  semerikov@gmail.com
     3 Institute of Information Technologies and Learning Tools of the NAES of Ukraine,

                         9 M. Berlynskoho Str., Kyiv, 04060, Ukraine
                              shyshkina@iitlt.gov.ua



       Abstract. One of the successful components of quality assimilation of
       educational material and its further use in the learning process is visualization of
       material in secondary education institutions. Visualizations need the subjects of
       the school course, which are the most difficult to understand and essentially do
       not have at the beginning of the study of widespread practical application, mostly
       mathematical objects. That is why this study aimed to analyze mobile tools that
       can be used to visualize teaching geometry. The object of the study is the process
       of teaching geometry in the middle classes of secondary schools. The subject of
       the study is the use of augmented reality tools in teaching geometry to students
       in grades 7-9. The study used such research methods as the analysis and
       justification of the choice of mobile augmented reality for the study of
       mathematics. Analyses displayed two augmented reality tools: ArloonGeometry
       and Geometry AR. In order to gain geometry instruction’s academic success for
       the students, these tools can be used by teachers to visualize training material and
       create a problematic situation. The use of augmented reality means in the
       geometry lessons creates precisely such conditions for positive emotional
       interaction between the student and the teacher. It also provided support to reduce
       fear and anxiety attitudes towards geometry classes. The emotional component
       of learning creates the conditions for better memorization of the educational
       material, promotes their mathematical interest, realizes their creative potential,
       creates the conditions for finding different ways of solving geometric problems.

       Keywords: geometry, augmented reality tools, Arloon Geometry, Geometry –
       Augmented Reality.




___________________
Copyright © 2020 for this paper by its authors. Use permitted under Creative Commons License
Attribution 4.0 International (CC BY 4.0).
80


1      Introduction

1.1    The problem statement
Modern rhythm of life and fast-changing information and communication technologies
require to the younger generation to adapt quickly to different situations, to acquire
knowledge in all conditions and to be able to apply the acquired knowledge in practice.
   All the recently innovations of the Ministry of Education and Science of Ukraine are
aimed to the fact that the graduate of the educational institution should possess certain
competencies and be able to independently acquire the knowledge necessary for solving
certain problems.
   On the one hand, we have certain requirements for a modern graduate of an
institution of secondary or higher education, who in the process of education must
develop various competences, acquire knowledge and become competitive not only in
the domestic but also in the world labor market.
   On the other hand, the situation in the system of secondary and higher education is
far from the State standard of education and requires changes, which have been
described in the documentation of the Ministry of Education and Science of Ukraine
for the last ten years.

1.2    Literature review
Analysis of scientific research has shown that one of the ways to change the situation
in the Ukraine education system is a competent and systematic introduction mobile
information and communication tools and technologies to the process of learning [2; 8;
10], and also changing the model of learning which means the transition from
traditional forms and methods of learning to innovative.
   According to Valerii Yu. Bykov [5], informatization of education has become a
revolutionary lever that relies on the achievements of classical psychological and
pedagogical science. This requires the development of specific tasks for the creation
and effective implementation of information and communication technologies in
educational practice.
   Serhiy O. Semerikov [12] indicated that the introduction of mobile ICT high school
education will contribute to the quality of education. It enhances the flexibility of the
learning process and meets the requirements of lifelong education and training and this
will also help to improve educational opportunities for people with disabilities by
offering them more flexibility and choice of time and place of study by delivering
training materials to their mobile devices to suit their needs.
   Scientists see one of the ways to improve the quality of mathematics education, in
particular in geometry, is the introduction into the education system of modern mobile
technologies – augmented reality [13].
   The work developed by [1], establishes a relationship between problem of
development of students' spatial thinking and introducing into the learning process of
augmented reality.
                                                                                       81


   It considers that the application Construct 3D, as a tool for constructing three-
dimensional geometric structures is a striking example of the use of augmented reality
in the study of geometry. This application uses stereoscopic main displays and personal
interactive panels. Construct3D allows multiple people to work in the same space and
build different geometric models that overlap with the real world.
   In [11] propose the possibility of using the SISEULER application in the study of
convex polyhedra for the development of spatial imagination in the study of 3D
geometry by means of augmented reality. You can use marker cards that show the
number of vertices, edges, and faces of a convex polyhedron and see a convex
polyhedron with the corresponding Euler characteristic.
   Using the AR Math application [7] gives students the opportunity to establish
connections between objects from the world around them and geometric shapes, to
determine their properties, which creates conditions for the formation of not only spatial
thinking, but also the ability to build logical connections. Such learning takes place
through virtual manipulation of objects in augmented reality.
   The use of AR Math application in the process of studying geometry provides an
opportunity to implement the following tasks [6]:
─ representation of both virtual and mathematical situation;
─ search for specific household items in a real environment and their recognition on
  the basis of computer vision algorithms;
─ solving the problem of determining geometric objects and their classification;
─ interactive interaction of students with a virtual person helps the student to solve a
  problem or write a solution in the form of a mathematical expression based on
  understanding of semantics (or to compare the found solution to one of the proposed
  mathematical expressions).
The implementation of AR Math tasks is based on the use of machine learning
algorithms, including, for example, the k-mean algorithm for selecting clusters of
objects by color or shape. The presence of a virtual assistant that engages students in
an augmented reality environment through the “Stories” of interesting history and
problem statement contributes to the study of real mathematics.
   Another interesting application that allows students to better understand the world
of geometry is the program GeoGebra AR [9]. The authors of the article claim that this
application will be useful not only for students to develop their spatial thinking, but
also for future teachers of mathematics. The systematic use of GeoGebra 3D Calculator
with AR can help develop students' research skills, expand their socialization
opportunities through the acquisition of ICT, which ensures the development of
universal STEM competencies. There is no question that the goal of every STEM
teacher should be to motivate and engage students in research activities [15].
   That is why the purpose of the article is to review some of the mobile ICTs that can
be introduced into the secondary education system of Ukraine in the process of studying
mathematics.
82


2      Research results

2.1    Main definitions and terms
The development of spatial visualization skills is one of the necessary skills required
for a graduate. This gives the student a better understanding of the environment and its
location. Well-developed spatial thinking makes the study of mathematics more
interesting and simple, as it makes it possible to visualize teaching material and make
mathematics more comprehensible.
   Our own experience in secondary and higher education institutions has made it
possible to single out a number of problems of teaching mathematics of high school
students and students of the first year of engineering specialties:
─ students of humanities subjects classes have no systematic knowledge of
  mathematics and are not able to integrate into the process of learning a new topic of
  previously known knowledge;
─ students of 10th grade, mostly liberal arts, in the process of studying 3D geometry
  do not have sufficiently developed spatial thinking and do not understand the
  location of basic geometric concepts in space;
─ according to a study conducted in the first year of full-time students at a technical
  university and high school students, 25% are unable to find the necessary
  information on the Internet and require constant monitoring and directed work by
  the teacher in the search for educational information;
─ most of first year students are underdeveloped with independent work skills.

Building a blended learning model is one way to solve these problems [4]. It has proven
itself on the positive side and is gaining more and more supporters in the world. This
makes the learning process interactive, enables you to learn at your own pace, build a
personal learning environment rich with mobile ICT [18].
   Blended learning is a deliberate process of acquiring knowledge by learning subjects
in the context of integrating classroom and extra-curricular learning. It is rich in
information and communication tools and technologies, which facilitates the
construction of its own learning trajectory independent of others.
   One of the ICT that can be used to visualize learning material in a blended learning
model is augmented reality technology. The application of this technology enables the
student or student to dive into mathematics and not burden it with its complexity.
   The development of students' spatial thinking is one of the pressing problems of
mathematical education. Its formation begins in the grades 7-9 course of 2D geometry
and deepens in the process of studying 3D geometry at grades 10-11. And if almost all
students in grades 7-9 can represent a geometric figure, then upper-class students in the
process of studying3D geometry have a problem with this:
─ cannot represent the spatial figure depicted in the plane;
─ cannot represent a spatial body, especially if there are additional conditions in the
  task;
─ cannot give examples of geometric bodies from the outside world;
                                                                                      83


─ cannot design a geometric body in space on a plane;
─ cannot distinguish parts in spatial objects.
One of the ways to solve these problems can be to use mobile tools in geometry lessons
or to visualize a geometric figure in the course of homework, namely augmented reality.
   Today, there are two basic concepts of augmented reality construction [3]:
─ based on a marker [17];
─ based on user coordinates [14].
Marker-based technology is a new interactive system for using a special marker. A
marker means an object that can be placed in space and which is defined and analyzed
by special software to further visualize the object. Based on the data obtained from the
token, the program automatically projects a virtual object on it, resulting in the effect
of its physical presence in space.
   Technologies based on user coordinates are used in mobile devices and rendering in
them is due to special sensors.

2.2    Experience of cloud technologies application and their services in
       educational and scientific space
So, during the studying geometry in grade 7, is advisable to introduce students to the
Spanish program Arloon Geometry (http://www.arloon.com/), which will make it
easier to understand the process of obtaining knowledge of geometry. The developers
recommend using this program, starting at the age of 10, to get acquainted with
geometric shapes and bodies (fig. 1).




                     Fig. 1. The ArloonGeometry application window.

You can download this application from Google Play with minimal requirements to
mobile device: Android 4.0.3 or higher, iOS 8.0 or higher.
    This program is not affiliated with any textbooks, but is completely autonomous and
is freely available but not free of charge, though its price is purely symbolic – $2.99.
    Features of this program are:
84


─ student can study geometry both in the plane and in space. Volumetric shapes have
  a planar sweep, and combinations of flat shapes created by the student on their own
  can be translated into space;
─ if you work with spatial bodies, you can learn to determine the area of the side
  surface or volume of this body;
─ in addition to getting acquainted with the spatial figures, the program can choose the
  mode of “perform exercises” and study formulas or calculations that work on one or
  another side face of a spatial polyhedron;
─ using of the program will enable students to find and identify polyhedrons or other
  geometric bodies in the environment;
─ independently perform the tasks in the sections “guess”, “right / wrong” and
  “calculation” and check how much material was learned.
The disadvantages of the program are
─ that it is not free;
─ today, it is only supported in English and Spanish.

Introducing 7th grade students to this program in geometry lessons will not only create
conditions for the development of spatial visualization skills, but will also allow
students to see the differences between 2D geometry and 3D geometry. But to
determine the applied orientation of geometry; understanding the essence of the
geometric task.
   In addition to the augmented reality application for geometry, you can also use
programs in chemistry, biology, arithmetic, anatomy and astronomy.
   It is advisable to use a mobile augmented reality tool such as Geometry – Augmented
Reality during the studying geometric shapes in 7th, and especially in 8th grades
(fig. 2).




                      Fig. 2. Geometry –Augmented Reality window.

Provided that Android 4.0 or higher, you can download this app for free on Google
Play. This app was first introduced in 2017 and given time is not popular enough. To
work with geometric shapes, you also need to download and print the letters that are
labeled for this program. The four letters A, B, C, and D are included, but can be
repeated to construct polygons.
                                                                                         85


   With this application and mobile device, the student is able to:
─ construct segments and determine their length in conventional units;
─ build triangles and find their perimeter and area;
─ build quadrangles and determine their perimeter and area;
─ work with polygons.
Through this program, students of 8th grade will be able to independently construct and
clearly understand the difference between a convex and a non-convex quadrilateral
when studying the theme “Quadrilaterals”. Determine this type of quadrilateral as a
parallelogram by changing angles, and also consider its special cases – rectangle,
rhombus, square (fig. 3).
   Using this program in geometry lessons in the 7th and 8th grades of secondary
schools will allow students to develop of spatial visualization skills as it enables them
to visualize geometric constructions, independently work with geometric figures and
change them at will.
   We will describe some possibilities of using Geometry AR when studying the topic
“Convex quadrilaterals” in 8th grade.
   After the teacher gives the definition of the concept of “quadrilateral”, it is advisable
to give students the opportunity to independently obtain images of different types of
quadrilaterals, so that the meaning of the definition is visualized in their understanding.
It is advisable to show them the difference between convex and non-convex
quadrilaterals by moving the labels (vertices of the quadrilateral) and changing the
lengths of the segments.
   The use of this program will create conditions for the construction of problem-based
learning in the study of different types of quadrilaterals. Students independently obtain
the properties of the quadrilateral under consideration, formulate its features and
“independently” receive a definition that is difficult for this type of quadrilateral.




                              a) construction of a segment
86




         b) construction of a triangle




     c) construction of a convex quadrilateral
                                                                                         87




                       d) construction of a concave quadrilateral

                    Fig. 3. Buildings in Geometry – Augmented Reality.

The possibility of self-visualization of quadrilaterals and the separation of their features
become even more important in the transition of the school system to the model of
blended learning. Therefore, the means of augmented reality become a necessary tool
in such a system of education.
   The analysis of various technologies and tools of augmented reality showed that at
present there are not enough developed and adapted programs for school education,
particularly in geometry courses. But at the same time, a sufficient number of platforms
have been developed to enable the teacher to create their own applications in AR
format, or to provide this opportunity for students.
   Consider some platforms for creating applications in AR format that are either freely
distributed or require special educational licensing [16]:
─ ARToolKit (http://www.hitl.washington.edu/artoolkit/) is a library of tools designed
  to create design solutions and augmented reality applications. This platform the most
  popular among developers.
─ Vuforia (https://developer.vuforia.com/) is a platform that allows you to create
  applications in AR-format for smartphones on iOS, Android. The ability to create
  and analyze flat images and simple three-dimensional objects, create geometric
  shapes makes it usable with the help of virtual controls, the user can rotate the object,
  zoom it.
─ HP Reveal (until 2018 Aurasma) (can be downloaded from Google Play) is a
  platform for creating augmented reality projects. Creating educational materials on
  this platform is very interesting and gives the opportunity to show their creative
  abilities not only to teachers but also to students.
88


─ Metaverse (https://studio.gometa.io/landing) is a platform that enables you to create
  interactive learning tasks without significant programming skills.
─ EV Toolbox (https://nitforyou.com/ev-toolbox/) is a simple and convenient
  constructor for all programmer users. The student or teacher can create augmented
  reality on their own. EV Toolbox Designer customizes the ability to visualize
  textbook material: mathematical abstractions, display a generated object on a
  smartphone screen: three-dimensional geometric shapes and surfaces. At the same
  time, the students' drawings on the plane are transformed into interactive 3D objects.
  Virtual Object Interaction visualizes an action that is practically impossible to
  perform on a piece of paper.
Therefore, it can be argued that a teacher in his profession can not only be a user of
developed augmented reality, but also become the creator of educational products that
will develop his creative potential.


3      Conclusions and prospects for further research

An analysis of some augmented reality tools that can be used in geometry teaching at
school has made it possible to draw the following conclusions:
1) creation of appropriate conditions for students' self-realization, their intellectual
   development and the development of their spatial imagination is the main task of
   the teacher, who is the organizer of the educational process;
2) the teacher in the learning process is the motivator for the construction of personal
   trajectory of learning. He / she demonstrates the ability to use a variety of
   information and communication tools and technologies for self-development and
   self-improvement;
3) the teacher, as an individual, also has a significant influence on the emotional state
   of the student. It is undeniable that the student's emotional attitude to the teacher
   reflects his / her attitude towards the subject. If the emotional component of the
   dialogue between the student and the teacher is some motivational component of
   their interaction, the learning outcomes are increased, the cognitive activity of the
   students increases, their creative potential is revealed, the learning process is
   intensified;
4) in the process of studying geometry, the emotional component has a significant
   impact on learning outcomes. It is advisable to begin every lesson in geometry
   precisely with the creation of a teaching dominance, which emotionally sets the
   students on to acquire knowledge and to apply them in everyday life;
5) the use of augmented reality means in the geometry lessons creates precisely such
   conditions for positive emotional interaction between the student and the teacher.
   First, students understand that a mobile device can be used precisely to organize
   the learning process, to intensify it and to build a personal learning path. Secondly,
   the emotional component of learning creates the conditions for better
   memorization of the educational material, promotes their mathematical interest,
   realizes their creative potential, and creates the conditions for finding different
                                                                                             89


      ways of solving geometric problems. Third, the ability to solve simple geometric
      problems with augmented reality tools creates a positive disposition for the student
      to succeed and to solve more complex problems faster and more intensively.


References
 1.   Belova, O.P, Kaznin, A.A.: Application of augmented reality technology for graphical
      visualization of educational tasks in spatial geometry. Concept 39, 3521–3525. http://e-
      koncept.ru/2017/971031.htm (2017). Accessed 21 Mar 2020
 2.   Bilyk, Zh.I., Shapovalov, Ye.B., Shapovalov, V.B., Megalinska, A.P., Dołhańczuk-Śródka,
      A.: Assessment of mobile phone applications feasibility on plant recognition: comparison
      with Google Lens AR-app. In: Burov, O.Yu., Kiv, A.E. (eds.) Proceedings of the 3rd
      International Workshop on Augmented Reality in Education (AREdu 2020), Kryvyi Rih,
      Ukraine, May 13, 2020, CEUR-WS.org, online (2020, in press)
 3.   Blagoveshchensky, I.A., Demyankov, N.A.: Technologies and algorithms for creating
      augmented reality. Modeling and analysis of information systems 20(2), 129–138 (2013)
 4.   Bondarenko, O.V., Mantulenko, S.V., Pikilnyak, A.V.: Google Classroom as a Tool of
      Support of Blended Learning for Geography Students. In: Kiv, A.E., Soloviev, V.N. (eds.)
      Proceedings of the 1st International Workshop on Augmented Reality in Education (AREdu
      2018), Kryvyi Rih, Ukraine, October 2, 2018. CEUR Workshop Proceedings 2257, 182–
      191. http://ceur-ws.org/Vol-2257/paper17.pdf (2018). Accessed 29 Nov 2019
 5.   Bykov, V., Dovgiallo, A., Kommers, P.A.M.: Theoretical backgrounds of educational and
      training technology. International Journal of Continuing Engineering Education and Life-
      Long Learning 11(4-6), 412–441 (2001)
 6.   Dyulicheva, Y.Y.: About the Usage of the Augmented Reality Technology in Mathematics
      and Physics Learning. Open Education 24(3), 44–55 (2020). doi:10.21686/1818-4243-
      2020-3-44-55
 7.   Kang, S., Shokeen, E., Byrne, V.L., Norooz, L., Bonsignore, E., Williams-Pierce, C.,
      Froehlich, J.E.: ARMath: Augmenting Everyday Life with Math Learning. In: CHI '20:
      Proceedings of the 2020 CHI Conference on Human Factors in Computing Systems. April
      2020, pp. 1–15. doi:10.1145/3313831.3376252
 8.   Kazhan, Yu.M., Hamaniuk, V.A., Amelina, S.M., Tarasenko, R.O., Tolmachev, S.T.: The
      use of mobile applications and Web 2.0 interactive tools for students’ German-language
      lexical competence improvement. In: Kiv, A.E., Shyshkina, M.P. (eds.) Proceedings of the
      7th Workshop on Cloud Technologies in Education (CTE 2019), Kryvyi Rih, Ukraine,
      December 20, 2019. CEUR Workshop Proceedings 2643, 392–415. http://ceur-ws.org/Vol-
      2643/paper23.pdf (2020). Accessed 20 Jul 2020
 9.   Kramarenko, T.H., Pylypenko, O.S., Zaselskiy, V.I.: Prospects of using the augmented
      reality application in STEM-based Mathematics teaching. In: Kiv, A.E., Shyshkina, M.P.
      (eds.) Proceedings of the 2nd International Workshop on Augmented Reality in Education
      (AREdu 2019), Kryvyi Rih, Ukraine, March 22, 2019. CEUR Workshop Proceedings 2547,
      130–144. http://ceur-ws.org/Vol-2547/paper10.pdf (2020). Accessed 10 Feb 2020
10.   Lavrentieva, O.O., Arkhypov, I.O., Krupskуi, O.P., Velykodnyi, D.O., Filatov, S.V.:
      Methodology of using mobile apps with augmented reality in students' vocational
      preparation process for transport industry. In: Burov, O.Yu., Kiv, A.E. (eds.) Proceedings
      of the 3rd International Workshop on Augmented Reality in Education (AREdu 2020),
      Kryvyi Rih, Ukraine, May 13, 2020, CEUR-WS.org, online (2020, in press)
90


11.   Lemos, B.M.: SISEULER: Um software para apoio ao ensino da Relação de Euler.
      Dissertation, Universidade Severino Sombra (2011)
12.   Modlo, Ye.O., Semerikov, S.O., Nechypurenko, P.P., Bondarevskyi, S.L., Bondarevska,
      O.M., Tolmachev, S.T.: The use of mobile Internet devices in the formation of ICT
      component of bachelors in electromechanics competency in modeling of technical objects.
      In: Kiv, A.E., Soloviev, V.N. (eds.) Proceedings of the 6th Workshop on Cloud
      Technologies in Education (CTE 2018), Kryvyi Rih, Ukraine, December 21, 2018. CEUR
      Workshop Proceedings 2433, 413–428. http://ceur-ws.org/Vol-2433/paper28.pdf (2019).
      Accessed 21 Mar 2020
13.   Rashevska, N.V., Soloviev, V.N.: Augmented Reality and the Prospects for Applying Its in
      the Training of Future Engineers. In: Kiv, A.E., Soloviev, V.N. (eds.) Proceedings of the
      1st International Workshop on Augmented Reality in Education (AREdu 2018), Kryvyi
      Rih, Ukraine, October 2, 2018. CEUR Workshop Proceedings 2257, 192–197. http://ceur-
      ws.org/Vol-2257/paper18.pdf (2018). Accessed 29 Nov 2019
14.   Shepiliev, D.S., Semerikov, S.O., Yechkalo, Yu.V., Tkachuk, V.V., Markova, O.M.,
      Modlo, Ye.O., Mintii, I.S., Mintii, M.M., Selivanova, T.V., Maksyshko, N.K., Vakaliuk,
      T.A., Osadchyi, V.V., Tarasenko, R.O., Amelina, S.M., Kiv, A.E.: Development of career
      guidance quests using WebAR. Journal of Physics: Conference Series (2020, in press)
15.   Shyshkina, M.P.: The Problems of Personnel Training for STEM Education in the Modern
      Innovative Learning and Research Environment. In: Kiv, A.E., Soloviev, V.N. (eds.)
      Proceedings of the 1st International Workshop on Augmented Reality in Education (AREdu
      2018), Kryvyi Rih, Ukraine, October 2, 2018. CEUR Workshop Proceedings 2257, 61–65.
      http://ceur-ws.org/Vol-2257/paper07.pdf (2018). Accessed 29 Nov 2019
16.   Stolyarova, I.V., Shulzhenko, O.V.: Augmented Reality in Geometry Lessons.
      Mathematical Education in the Digital Society: Materials of the XXXVIII International
      Scientific Seminar of Teachers of Mathematics and Informatics of Universities and
      Pedagogical Universities, pp. 294-297 (2019)
17.   Syrovatskyi, O.V., Semerikov, S.O., Modlo, Ye.O., Yechkalo, Yu.V., Zelinska, S.O.:
      Augmented reality software design for educational purposes. In: Kiv, A.E., Semerikov,
      S.O., Soloviev, V.N., Striuk, A.M. (eds.) Proceedings of the 1st Student Workshop on
      Computer Science & Software Engineering (CS&SE@SW 2018), Kryvyi Rih, Ukraine,
      November 30, 2018. CEUR Workshop Proceedings 2292, 193–225. http://ceur-ws.org/Vol-
      2292/paper20.pdf (2018). Accessed 21 Mar 2020
18.   Tkachuk, V., Semerikov, S., Yechkalo, Yu., Khotskina, S., Soloviev, V.: Selection of
      Mobile ICT for Learning Informatics of Future Professionals in Engineering Pedagogy.
      CEUR-WS.org, online (2020, in press)