Videos

NEW! - Videos for iPods

NEW! - Videos for iPhones

Foreword  The videos in the new Flash format are marked with an asterisk (*).

New in February 2010 (new format)
*Equations of parallel and perpendicular lines 1
*Equations of parallel and perpendicular lines 2

New in January 2010 (new format)
*Changing the subject when it appears twice
*Upper and lower bounds 2 - calculations

Advanced Level
*Planar graphs and Euler's relationship
*Planarity proofs
*Algebraic Long Division 1
*The Bubble Sort Algorithm
*The Shuttle Sort Algorithm

Number and Algebra
*Percentage Multipliers 1
*Direct and inverse proportionality
*Factors of Numbers
*Prime Numbers 1 - The Sieve of Eratosthenes
*Prime Factors 1
*Prime Factors 2 - HCF
*Prime Factors 3 - LCM
*Reciprocals 1
Multiplying by Fractions 1
Dividing Numbers by Fractions
Converting Recurring Decimals to Fractions 1
*Indices 1 - Multiplying
*Indices 2 - Dividing
*Indices 3 - Powers of powers
*Upper and Lower Bounds 1
*Upper and lower bounds 2 - calculations
*Surds 1 - What are surds?
*Surds 2 - Some basic rules
*Surds 3 - Simplifying 1
*Surds 4 - Simplifying 2 - Rationalising the Denominator 1
*Proofs about Numbers 1
Squaring Brackets
*Changing the subject when it appears twice
Making Formulae 1
Making Formulae 2
Making Formulae 3
Equations 1
Equations 2
nth Term of a Linear Sequence
*Trial and Improvement 1
*Inequalities - Regions of Graphs
*Straight Line Graphs 1 - Gradients
Straight Line Graphs 2 - Gradients and Equations
Straight Line Graphs 3 - Intercepts and Equations
*Equations of parallel and perpendicular lines 1
*Equations of parallel and perpendicular lines 2
Completing the Square 1
*Simplifying Algebraic Fractions 2
*Algebraic Fractions 3 - Equations
*Simultaneous Equations with Quadratic Terms 1
*Simultaneous Equations with Quadratic Terms 2

Shape and Space
*Areas of Trapeziums
*Constructions - Bisecting Angles
*Constructions - Perpendicular Bisectors
*3 More Constructions
*Reflections 1
*Rotations 1
*Translations 1
*Circles and Isosceles Triangles
Angles in Cyclic Quadrilaterals
Angles in Cyclic Quadrilaterals in Reverse
Angles in Cyclic Quadrilaterals - Proof
*The Angle in a Semicircle
*The Angle in a Semicircle ... Proof
*Angles in the Same Segment
*The Angle at the Centre ...
*The Angle at the Centre ... Proof
*Circles and Tangents - 2 Theorems
*The Angle in the Alternate Segment ...
*Circles - Sector Areas and Arc Lengths
*Circles - Triangle and Segment Areas
*Loci 1
*Loci 2
*Similar Triangles 1
*Similar Shapes - Lengths and Distances
*Similar Shapes - Areas
*Congruent Triangles 1 - Introduction
*Congruent Triangles 2 - SSS
*Congruent Triangles 3 - SAS
*Congruent Triangles 4 - AAS
*Congruent Triangles 5 - RHS
*Lengths and angles inside cuboids

Data Handling
*Probability - tree diagrams 1
*Tree diagrams 2 - dependent events
Estimating the Mean of Grouped Data
Cumulative Frequency Diagrams 1 - Introduction
Cumulative Frequency Diagrams 2 - Median and Quartiles
Cumulative Frequency Diagrams 3 - Boxplots
Frequency Polygons 1
Moving Averages 1
*Moving Averages 2
*Histograms 1 - Drawing Histograms
*Histograms 2 - Interpreting Histograms
*Histograms 3 - A Common Type of Question