Find the HCF and LCM of two or more numbers

Prime Factors 2 video  HCF
Prime Factors 3 video LCM
Prime factors applet  HCF, LCM

Rounding to significant figures


Convert between recurring decimals and fractions

Converting recurring decimals to fractions video
Converting recurring decimals to fractions applet

Standard index form

Standard Index Form applet

Percentage multipliers, 'reverse' and multiple percentages, compound interest

Percentage multipliers video
Percentage multipliers worksheet (.pdf)

Solve harder linear equations

Harder Equations applet

Expand two brackets and simplify


Solve quadratic equations by factorising

Factorising quadratics

Rearrange formulae with brackets, fractions and roots


Solve linear inequalities

Solving inequalities applet

Sets of Inequalities  Regions of Graphs

Inequalities  Regions of Graphs video
Inequalities  regions of graphs applet

Simultaneous equations

Simultaneous equations solved algebraically  applet
Simultaneous equations 1 video
Simultaneous equations 1a video
Simultaneous equations 2 video
Simultaneous equations solved graphically applet

Angles in circles

Circles and isosceles triangles video
Cyclic quadrilaterals video
Angle in a semicircle... video
The angle at the centre ...
Angles in the same segment... video

Properties of tangents and chords of circles

2 theorems about tangents and circles video
The alternate segment theorem video

Dimensions and formulae

Dimensions and formulae

Similar triangles

Similar triangles 1

Pythagoras  distance between coordinates


Trigonometry in rightangled triangles

Simple trigonometry applet

Time series and moving averages

Moving averages 1 video

Cumulative frequency diagrams

Cumulative frequency diagrams 1 video
Cumulative frequency applet

Estimating median and interquartile range

Median and quartiles video

Boxplots

Boxplots video
Boxplots lesson

Probability  tree diagrams

Tree diagrams 1
Tree diagrams 1 applet
Tree diagrams 2 applet
Tree diagrams 3 applet
