This is one platform for teachers and students. Teacher can add homeworks and schoolworks, add taks etc. Student do that tasks and teacher evaluete progress of each students.
Teacher make task 5+6=?, and student do it. If correct, system recognize it and make smiley on the screen and sound aplausse.
One task is one soroban abacus. Abacus show some number and students guess which is that number.
Teachers can also add some homeworks and evaulate everything.
One another task is: System shows some nombers, (for example 15, 23, 16, -8, etc) and one the end show results od summ of that number. We can decide what is speed of changing numbers.