IGCSE Foundation (Edexcel)
Revision Guide
To get a grade C, you need to know and understand all of the topics below. Topics which currently have information pages are hyperlinked in blue. More added daily so keep checking back!
Whole numbers 
Place value
Positive and negative numbers in practical situations (e.g. temperature) Order whole numbers Add, subtract, multiply and divide Order of operations (BIDMAS) Odd and even numbers Prime numbers Factors Common factors Multiples Common multiples 
Fractions 
Equivalent fractions
Simplify fractions Mixed numbers Improper fractions Apply common denominators to order fractions Calculate fractions of amounts Write one number as a fraction of another Add and subtract fractions Convert a fraction to a decimal or percentage Multiply and divide a fraction by a whole number Multiply and divide two fractions 
Decimals 
Order decimals
Convert a decimal to a fraction or a percentage 
Sets 
Use "and", "or" and the empty set

Percentages 
Understand that percentage means "out of 100"
Write one number as a percentage of another Write a percentage as a fraction and as a decimal Calculate percentages of amounts Solve percentage increase and decrease problems Find percentage change 
Proportion 
Use proportional reasoning

Rounding 
Round to the nearest 10, 100, 1000
Round to decimal places Round to significant figures Identify lower and upper bounds 
Units 
Metric units
Time calculations Currency conversion 
Using a calculator 
Be able to use a calculator accurately

Algebra basics 
Algebraic notation
Writing expressions using algebra Order of operations (BIDMAS) in algebra Simple index laws Substitute into formulae Collect like terms Expand a single bracket Factorise by removing common factors Expand simple quadratics 
Equations 
Solve linear equations including:
Set up simple equations Solve simple simultaneous equations 
Inequalities 
Use inequality symbols
Show inequalities on a number line Solve simple linear inequalities Represent simple inequalities on graphs 
Sequences 
Generate terms of a sequence
Find missing terms of a sequence and the rule for generating it 
Graphs 
Speed/time and distance/time graphs
Use the coordinate system Find the midpoint of a line segment Use conversion graphs Find the gradient of a straight line Recognise y = mx + c Plot linear graphs Plot quadratic graphs 
Angles and triangles 
Classify and name angles (acute, obtuse, reflex, right angle)
Angles on a straight line Angles at a point Vertically opposite angles Alternate and corresponding angles Angle sum of a triangle Name and classify triangles (equilateral, isosceles, scalene, right angled) 
Polygons 
Recognise and name polygons (parallelogram, rectangle, square, rhombus, trapezium, kite, pentagon, hexagon and octagon)
Angle sum of a quadrilateral Properties of parallelogram, rectangle, square, rhombus, trapezium and kite Regular polygons Interior angle sum of polygons Calculate interior angles of regular polygons Calculate exterior angles of polygons Identify congruent and similar shapes 
Symmetry 
Line symmetry
Rotational symmetry 
Measures 
Read scales accurately
Use 12hr and 24hr clock Make sensible estimates Use bearings Measure angles to the nearest degree Speed, distance and time 
Constructions 
Measure and draw lines
Construct triangles Use scale drawings Construct a perpendicular bisector of a line segment Construct an angle bisector 
Circle properties 
Name parts of a circle (centre, radius, chord, diameter, circumference, tangent, arc, sector and segment of a circle)
Chord and tangent circle theorems 
Pythagoras and trigonometry 
Measurements 
Convert metric measurements
Perimeter Area of rectangle Area of triangle Area of parallelogram Area of trapezium Circumference of circle Area of circle 
3D shapes and volume 
Name 3D shapes (cube, cuboid, prism, pyramid, cylinder, sphere and cone)
Faces, vertices and edges Surface area of simple shapes using the area formulae for triangles and rectangles Surface area of a cylinder Volume of simple triangular prisms Volume of cuboids Volume of cylinder Convert between units of volume 
Transformations 
Rotations
Reflections Translations Enlargement (positive scale factor) Describe transformation 
Charts 
Pictograms
Bar charts Pie charts Interpret these 
Averages etc 
Mean, median, mode and range for simple discrete data
Solve problems Estimate mean for grouped data Identify the modal class 
Probability 
Use probability scale
Use sample spaces List all outcomes Relative frequency Mutually exclusive Expected frequency (estimate probability) 