Page 7    Perfect Numbers
Page 8    Prime numbers visually
Page 14  The Missing Dollar Paradox
Page 18  Difference between two dates

Chapter 3 - Fractions

Page 37    Left-handedness
Page 43    Adding fractions
 

Chapter 5 - Ratios and Rates

Page 80   Colour mixing (RGB) (1)
Page 80   Colour mixing (RGB) (2)   

Chapter 6 - Approximations, standard form and estimation

Page 86    When are zeros significant?
Page 93   US National Debt Clock
Page 93   World population clock
Page 96   Standard form converter
Page 96   The scale of the universe

Chapter 7 - Formulae and substitution

Page 106   Pyramid numbers (sums of squares) (1)
Page 106   Pyramid numbers (sums of squares) (2)

Chapter 11 - Two pairs of brackets

Page 153   Difference of two squares

Chapter 12 - Two-dimensional Graphs

Page 170   The Body-Mass Index Calculator

Chapter 13 - Graphs using rules from algebra

Page 188   Straight-line grapher from rule

Chapter 14 - The metric system, scales and tables

Page 204  Metric length conversions
Page 207  Ferris wheel - metric conversion challenge
Page 210  Is midday 12 am or 12 pm?

Chapter 15 - Area of polygons

Page 227    Area of parallelograms (1)
Page 227    Area of parallelograms (2)
Page 227    Area of trapeziums
Page 229    Honey, I've shrunk the area!

Chapter 16 - Circles - circumference and area

Page 236   Pi to more decimal places than you will ever need 
Page 236   The Greek alphabet

Chapter 17 - Volume and surface area

Page 250   Surface area and volume of cuboids
Page 258   Volume of a rectangular prism

Chapter 18 - Angles 1 - intersecting and parallel lines

Page 267   Security Sensor question part 2d
Page 271   Sum of angles of a triangle (1)
Page 271   Sum of angles of a triangle (2)
Page 276   Alternate angles and angles in a triangle

Chapter 19 - Angles 2 - Polygons

Page 287   Exterior angles of a polygon (1)
Page 287   Exterior angles of a polygon (2)


Chapter 20 - Tessellation

Page 292   Tessellation town
Page 292   The tessellator
Page 292   Tessellation links
Page 294   Tetrominoes on a chessboard

Chapter 21 - Three dimensions

Page 300   The Klein bottle
Page 300   Building blocks
Page 301   Platonic solids (1)
Page 301   Platonic solids (2)
Page 303   Isometric drawing tool
Page 311   The pentagonal potato slice

Chapter 22 - Pythagoras

Page 314   Pythagoras demonstration
Page 314   Three squares
Page 326   The spider and the fly

Chapter 24 - Trigonometry 2 - Calculating any side length

Page 347   SOH-CAH-TOA mnemonics
Page 355   The moving cuboctahedron

Chapter 26 - Construction, scale drawing and loci

Page 364   Perpendicular bisector
Page 365   Perpendicular to a line from a point not on the line
Page 366   Perpendicular to a line at a point on the line
Page 369   Perpendicular bisectors of a triangle

Chapter 27 - Transformations 1 - Symmetry and enlargement

Page 387   The Diamond 16 Puzzle
Page 396   Frieze patterns


Chapter 30 - Displaying statistical information

Page 424   Pie graphs
Page 426   All Black Test appearances
Page 430   Vowel frequency analysis
Page 435   National Climate Centre - El Nino

Chapter 31 - Working with data

Page 439   The mode
Page 447   Stem and leaf plotter
Page 449   Box plots
Page 460   Car registration statistics

Chapter 32 - The statistical enquiry cycle

Page 463   CensusAtSchool

Chapter 33 - Probability

Page 484   The racing cars
Page 486   Tongue-rolling