Mathematics
Six booklets with maths exercises. The first booklet teaches to count. The second one presents exercises for the first grade level: combine objects represented in equal quantities, identify shapes and solids, sequencing, add using visual aids. In the third booklet, the exercises are slightly more complex: adding, subtracting, tens and units, skip counting, etc. The last three include more complex operations presented in grades 3 to 6 (multiplication, division, fractions, etc.)