Content of the book: Numbers 11-20: addition with sums above 10; subtraction with differences below 10; understanding the relationship between addition and subtraction; checking the results of subtraction; doubling; halving and doubling numbers; even and odd numbers; Numbers 0-100: units, tens (0, 10, 20, ..., 100) and one hundred; greater than/less than; number series; Telling the time: on the hour and half past; Geometry: wholes; 2D shapes; Fundamentals of measurement; centimetres