Microsoft Word types of mobile educational games for children in primary school

Worldwide 
Bulgaria 
Operating system 
Market share 
Operating system 
Market share 
Android 
76.67% 
Android 
88.06% 
iOS 
22.09% 
iOS 
11.42% 
KaiOS 
0.42% 
Windows 
0.27% 
Unknown 
0.21% 
Samsung 
0.15% 
Samsung 
0.17% 
Unknown 
0.02% 
Windows 
0.15% 
Series40 
0.02% 
Table 1 presents statistics on the operating systems used by mobile devices in the world and in 
Bulgaria, which can be concluded that mobile applications must be implemented for the development 
of mobile educational games in both Bulgarian and English mainly for Android and iOS operating 
systems. 
For this reason, a thorough study only of the games for pre-schoolars and in the early stages is done, 
mainly on Google Play and the App Store. Most of them are in English, which limits their use because 
of the language barrier at this age. Most of the games are free and the rest are either fully or only part 
of the levels paid. Particular attention is paid to the games in Bulgarian, which are intended for training 
in mathematics and Bulgarian for the age group of 5 to 10 years. 
66 English games have been reviewed (eg. Math for Kids, Math Challenge, Math Chef, Math Bingo, 
Learn and Write, Word Snack, Learning Letters Puppy, Endless Alphabet, etc.). 16 games were 
studied in Bulgarian language (BG Numbers; BG Pupil; Letters, Numbers, Colours; Bulgarian 
Alphabet; BG Letter; Speech Development; Letters; Words; BG Syllables; BG words; School game for 
elementary school; Math vs Undead; Letters; Bulgarian Letters; Numbers; Letters with Vitamins; and 
Apple). 
3.3 Classification of game assignments 
This section presents a classification of the game types suitable for implementation as mobile gaming 
applications (see Table 2) to support primary school mathematics education. To illustrate the types of 
math games, examples are given through mathematics assignments for grade 3 (see Fig. 1 to Fig. 7), 
for which the Bulgarian textbook for mathematics for grade 3 was used as a source [9]. The first 
practical experiment is planned for this age group of students. 

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The classification in Table 2 is based on the classification proposed by [25] and the recommendations 
for the preparation of e-resources in [26]. The classification of [25] was made in terms of computer 
implementation of test questions and assignments with a view to their implementation in an e-learning 
environment, which makes it an appropriate basis for creating a classification of game assignments in 
terms of their mobile implementation. 
The classification contains 13 types of game assignments that are suitable for mobile conversion, 
divided into 8 categories. For each type, examples are given in FIG. 1 to FIG. 7. For type 7.2. There 
are three examples for filling in an open answer template (see Fig. 6 and Fig. 7). For type 8.1. Open 
answer is not an example because this group includes all the assignments that require a free format 
solution. 
For each type, a prototype of a mobile application will be implemented, the goal being that each 
assignment can be presented with several different subjects and designs. For example, selecting one 
of four balloons (see Fig. 1 (a)) or selecting one of four soccer balls, which are two assignments of the 
same type (which may even contain exactly the same meaningful information), will give each child a 
choice about what design they want to work with. A game plot must be provided for each design so 
that students are intrigued to play. 
Table 2. Types of math game assignments