Tips on how to use this exercise at home and at school.

*Early math concepts*

Children have already encountered "blocks" in the app. At the moment, this is an exercise focusing on prisms to get the children more familiar with them. The app works with prisms a lot in the following exercises.

The exercise promotes awareness of generalising numbers using prisms. Children can 'feel' the prisms by manipulating them. They become aware of the number of pieces, compare the number of pieces with each other, and drag the pieces across the screen. Initially, they will count the pieces in the prisms even one at a time, but gradually we encourage children to "feel" the number straight away.

**Why is this exercise important?**

The child has the experience of counting off individual objects. Thanks to the opportunities with counting, he gradually generalizes, discovering that counting on his fingers or with prisms, for example, will serve him in the same way. The fingers or blocks or the abacus become a tool (model) for counting.

This is the path to a future abstract understanding of numbers.

**Who is the exercise suitable for?**

Generally belongs to early school games. It develops numerical ideas and rational assumptions.

**Methodological recommendations**

According to the assignment, various large (long) prisms, i.e. strips made up of individual pieces, will appear on the screen on the lines. For clarity, the pieces after the fifth one are separated by a wider space to make it easier to see the number that is greater than 5.

If a child has the number 7 on his fingers, he can already point 5 fingers and 2 to go with it without thinking. He or she realizes that 7 is 2 more than 5, although he or she cannot yet put it into words in this precise way.

In the settings we can make the tasks easier or harder:

- Choose the number 5 and 5 rows then the child ascends or descends one by one in the range 0-5
- Choose 10 and 10 rows then the child ascends or descends one number at a time in the range 0-10
- Select 10 and for example 5 rows as instructed, the child sorts the numbers in ascending or descending order, but not one by one. This is a more challenging option.
- You can set only the ascending row, only the descending row, or randomly both options.

**Tips for similar activities outside the app**

We can use any sorting and comparing of objects. Use Lego blocks, wooden blocks or cut straws so that their size expresses the relationship between the numbers 1-10.

Each part of the object must represent one piece of a particular number. For example, the number ten will have ten equal-sized pieces of cut straw. A five will be represented by five equally sized bones, and so on.

The child can then sort the straws blindly (manipulating the straws and holding a towel over his hands). In this way, he or she will engage in tactile proprioceptive perception (sensory perception that both controls and determines the tension of our muscles).

This functionality is under construction.