The Additive World Up to 10
Playing with Math 2 is based on 41 game-exercise cards. The formative path of this book is structured with these conceptual areas:

Pp.3-7 Addition as quantifying operation of positional value on the line of numbers
Pp.8-13 Addition as operation of quantification of adding and uniting. Introduction to the concept of machine
Pp.14-20 Addition as operation of completing and grouping
Pp. 21-23 Problems of addition on adding, unite and complete
Pp. 24-31 Comparison of the operation of addition and subtraction by adding or subtracting 1 from 0 to 9
Pp.32-38 Understanding and calculus within 9 of a subtraction operation gained from the number line, with groupings, with machines and with disunions
Pp.39-42 Problems with subtractions based on subtracting, decomposing and comparing

The Series' theoretical model and formative path are visible on this website: http://didactics.ispef.eu/psychodidactic.htm