Basic Maths Skills Videos
GCSE Grade B (NC Level 8) Topics
Topic 1  Changing Recurring decimals to fractions
This video goes through 4 examples of changing recurring decimals to fractions.
General Tutorial: maths247 

Topic 2  Repeated Percentage Change
This video explains how to increase and decrease percentages using a multiplier, this allows you to do repeated percentage change very quickly. The practice link is to some standard percentage increase and decrease questions but try to do them with multipliers.
Interactive Practice from CIMT : Percentage increase/decrease questions Worked exam questions: RawMaths 

Topic 3  Standard Form
This video explains how to change numbers into and out of standard form and how to do calculations with and without a calculator.
Interactive Practice from CIMT : Standard form practice Worked exam questions: RawMaths 

Topic 4  Factorising quadratic expressions
This video goes through some basic examples of factorising quadratics by looking at the different combinations of signs in the expression.
Interactive Practice from CIMT : Lots of factorising Just Qu 2 General Tutorial: maths247 Hegartymaths  harder ones 

Topic 5  Expanding two brackets
This video goes through three different methods for expanding double brackets.
Interactive Practice from CIMT : Questions 511 General Tutorial: maths247 

Topic 6  Changing the subject of a formula
This video goes through four examples of changing the subject of a formula including squares, square roots and a simple verision of factorising.
Worked exam questions: RawMaths General Tutorial: maths247 

Topic 7  Evaluate algebraic formulae
This video goes through three examples of putting numbers into formulas (substitution) with and without a calculator. The practice questions below are fairly basic but get harder.
Interactive Practice from CIMT : Without a Calculator Questions 39 Using a Calculator practice 

Topic 7b  Solving simultaneous equations
This video goes through two examples of solving simultaneous equations using the elimination method, which is the standard one at this level.
Interactive Practice from CIMT : Questions 710 Worked exam questions: RawMaths General Tutorial: Hegarty maths247first 7 mins 

Topic 8  Represent Inequalities graphically
This video explains three examples of inequalities drawn on a graph.
Interactive Practice from CIMT : More general but useful Worked exam questions: to follow at some point soon :) General Tutorial: RawMaths 

Topic 9  Identifying types of graphs
This video goes through the main types of graph shapes and their associated equations.
MyMaths revision : Transforming Graphs  Lesson Transforming Graphs  worksheet 

Topic 10  Transformations of graphs
This video goes through all the transformations of graphs you only need the ones were you Add/Subtract and Multiply/Divide.
General Tutorial: maths247 

Topic 11  Similar shapes length, area and volume
In this video Hegarty explains what we mean by the word similar in mathematics, it also goes through how to change from a length to area to volume
scale factor and does a few nice examples. Check out the Maths247 video which is very similar (no pun intended)
Interactive Practice from CIMT : Similar shapes (lengths) Len,area and vol scale factors Worked exam questions: RawMaths1 2 3 4 HegartMaths Maths2471 2 General Tutorial: maths247  Similar Triangles Length,Area,Vol scale factors 

Topic 12  Trigonometric ratios in rightangled triangles
This video recaps the method used to find the missing angle in a right angled triangle when you are given two side lengths. There is an example for each
of the three trig ratios sin, cos and tan. It also works through three examples of finding lengths when given an angle and a side on for each of sin, cos and tan.
Interactive Practice from CIMT : Using trig functions Finding Sides Finding Angles Worked exam questions: RawMaths(angles)1 2 3 4 5 RawMaths(sides)1 2 1 2 3 General Tutorial: 3D1 2 3 4 5 Pyramid 1 2 3 

Topic 13  Dimensions of Formulae
This video gives a brief explanation of how to know if a formula is length, area of Volume (Its by MathMathsMathematics). This is not a standard topic at
GCSE Maths any more so I havent got around to sorting out my own video for it yet.


Topic 14  Median and IQR from Cumulative Frequency Graphs
This video goes through how to plot and work out medians and IQR from Cumulative frequency grasphs as well as Box Plots (Box plots not tested in this topic though).
Interactive Practice from CIMT : Cumulative Frequency MyMaths revision : Cumulative Frequency  Lesson Cumulative Frequency  worksheet 

Topic 15  Comparing distributions
This video is the same as the level 7 one not much difference in my opinion.


Topic 16  AND & OR rules for Probability
No video as yet but there is a link to the OR rule on Mymaths.
MyMaths revision : The Or Rule  Lesson The Or Rule  worksheet 

Topic 17  Probability  Using Tree diagrams
This video goes through how to use tree diagrams to solve complex probability questions. If you want to use the MyMaths links login seperately first.
Interactive Practice from CIMT : Probability of 2 Events MyMaths revision : Tree diagrams  Lesson Tree diagrams  worksheet 