Key Stage 3

Showing 129–144 of 150 results

Key Stage 3

Subtraction with Decimal Numbers

How to use the column method to perform a subtraction with decimal numbers.  More able students add and subtract...

Subtraction with Negative Numbers

Students learn how to subtract with positive and negative numbers on a number line and using written methods.  M...

Surface Area of Cubes and Cuboids

Students learn how to find the surface area of cubes and cuboids using nets and 3D drawings.  As learning progre...

Surface Area of Prisms

Students use net drawings and 3D representations to calculate the surface area of prisms made from parallelogram...

Tessellation with Shapes

Students learn about tessellation with shapes.  More able students consider the angles of each shape.  Less able...

Total Surface Area of Cylinders

Students learn how to calculate the total surface area of cylinders using net drawings.  As learning progresses ...

Translating Shapes using Vectors

Students learn about translating shapes using vectors. As learning progresses they move from performing translat...

Understanding Set Notation

Students learn how to find the union and intersection of elements using basic set notation.  As learning progres...

Using Graphs to Solve Linear Equations

Students learn about using graphs to solve linear equations. Learning progresses from solving equations where th...

Using Parabolas to Solve Quadratic Equations

Students learn how to find the solutions to a quadratic equation using graphs.  Learning progresses from solving...

Using Real Life Graphs

Students learn how to model situations or procedures using real life graphs.  Learning progresses from drawing t...

Using Scientific Calculators

Students practise using scientific calculators to solve problems involving brackets, powers and the order of ope...

Vertically Opposite Angles and Around a Point

Building on angles on a straight line students learn how to recognise vertically opposite angles and find angles...

Volume of a Cylinder

Students learn how to calculate the volume of a cylinder both in terms of pi and as a decimal to three significa...

Volume of Cubes and Cuboids

Students learn how to find the volume of cubes and cuboids using the area of the  cross-section and depth.  Lear...

Writing Expressions using Diagrams

Students learn about writing expressions using diagrams.  As learning progresses they create their own shapes fr...

Mr Mathematics Blog

Calculating the Volume of a Pyramid

When calculating the volume of a pyramid we can substitute the values of the length, width and perpendicular height into the formula V = 1/3 lwh.  In my experience this is often provided for the students with little explanation as to why a volume of a pyramid is exactly one third the volume of a […]

Solving 3D Problems using Trigonometry

When teaching solving 3D problems using trigonometry we begin the lesson with a recap of Pythagoras’ Theorem and the three trigonometric ratios.  We do this by matching the ratio and equations to the respective right-angled triangle.   Students are encouraged to work in pairs and to show the diagrams as part of the working out on […]

Rounding to a significant figure

When I teach rounding to a significant figure, I ask the class to discuss in pairs or small groups a definition for the word significant.  It is a word that all the students have heard before but not all are able to define. After 2 or 3 minutes of conversation I ask the students to […]