Part 1 Graphs: conversion graphs; graphs and rules; time; using time. Part 2 Estimating your mental power: squares and roots; mental maths; estimation. Part 3 Statistics - questions and answers: diagrams and charts; pie-charts; designing a questionnaire. Part 4 Algebra: number patterns; reversing rules; finding your own rules. Part 5 Transformations: reflections; movement - translations; rotation; enlargement. Part 6 Don't be negative!: replay; using money; the calculator. Part 7 Angles: replay; parallel lines; polygons; bearings. Part 8 Probability: replay; it always adds up to 1; probability diagrams. Part 9 Percentages and fractions: simple percentages; calculating percentages; fractions. Part 10 Straight lines: lines of the grid; patterns of lines; curves from straight lines. Part 11 Ratio: the metric system; changing sizes; proportion; maps and scales. Part 12 Area: perimeter and area; compound shapes; areas of triangles. Part 13 Statistics - getting it together: averages and range; grouping data; frequency polygons. Part 14 Volume - filling the space: pack it in!; stacking; stacking it higher. Part 15 More or less?: trial and improvement; simple equations; order in number. Part 16 The crossing point: intersecting lines; graphs of patterns; solving puzzles. Part 17 Help yourself: adding; subtracting; multiplying; multiplying by 10; multiplying by 100, 1000,...; multiplying by 20, 30,...; long multiplication; dividing; dividing by 10; dividing by 100, 1000,...; dividing by 20, 30,...; adding fractions; subtracting fractions. Part 18 Answers: test yourself; help yourself.