Key Stage 3

Showing 1–16 of 150 results

Key Stage 3

3D Shapes and Prisms

Students learn about 3D shapes and prisms using their cross section, faces, vertices and number of edges.  More ...

Adding Fractions using a Fraction Wall

Students learn how to add fractions with different denominators using equivalent fraction diagrams.  As learning...

Addition with Decimal Numbers

Students learn how to perform addition with decimal numbers using place value and the column method.  Number pyr...

Addition with Negative Numbers

Students learn how to perform addition with negative numbers  Later in the lesson they are challenged to work wi...

Alternate and Interior Angles in Parallel Lines

Students learn how to recognise and calculate alternate and interior angles in parallel lines.  As learning prog...

Alternative Number Systems

Students investigate alternative number systems including the Roman and Egyptian systems.  Less able students cr...

Angles of Elevation and Depression

Students learn how to construct and use scale drawings to measure angles of elevation and depression and unknown...

Area of Composite Shapes

Students learn how to find the area of composite shapes.  Learning progresses from counting the squares inside t...

Area of Triangles and Composite Shapes

Progressing on from finding the area of a triangle students calculate the area of composite shapes made up of tr...

Averages using the Median and Mode

Students learn about averages using the median and mode.  As learning progresses they use the averages to compar...

Bisecting an Angle

Students learn how to construct an angle bisector using a pair of compasses and ruler.  As learning progresses t...

Calculating a Percentage Change

Students learn about calculating a percentage change using a decimal multiplier.  Learning progresses from findi...

Calculating a Probability from Sample Space Diagrams

Students learn how to create a sample space diagram to find the probability of two or more events. As learning p...

Calculating a Simple Interest in Financial Mathematics

Students learn about calculating a simple interest in financial mathematics. Learning progresses from calculatin...

Calculating Fractions of an Amount

Students learn about calculating fractions of an amount using both diagrams and written methods.The start of...

Calculating Probabilities from Two-Way Tables

Students learn how to calculate a probability from a two-way table.  As learning progresses students learn how t...

Mr Mathematics Blog

Comparing Datasets using the Mean and Range

In my experience, students, in general, find the concept of a mean straightforward to calculate and understand. However, the mean alone does not provide a complete picture of a set of data. To achieve this, a measure of spread is also required. The range is the simplest measure that can be used for this. Not […]

Solving Problems with Angles in Parallel Lines

Solving problems with angles in parallel lines is like solving a murder mystery.  One clue leads on to the next and the next until the murderer is found.  However, it doesn’t end there.  The detectives need to explain their reasoning in court using the relevant laws and procedures should the murderer plead not guilty.  If […]

Solving Two Step Equations using the Balance Method

An equation is when one expression, or term, is equal to another.  To solve an equation means to find the value of the variable (represented by a letter) that makes the two expressions equal.  There are two types of equations for secondary school mathematics, linear and none-linear.  In this blog I write about how I […]