1. Number and variable (arithmetic and algebra)1.1 number(Arithmetic)1.2 Variables(Algebra)2. Sizes, functions, dates and coincidence (calculation)2.1 Statistics and Probability2.2 Sizes and dimensions2.3 Functional relationships3. Shape and Space (Geometry)3.1 Mappings and symmetries3.2 Geometry in the plane3.3 Geometry in space (geometric bodies)​