Learning Mathematics
A Common Factor and a Common Multiple Solve Different Grouping Problems
Use equal groups and repeating schedules to distinguish common factors from common multiples, with small examples learners can check themselves.
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Learning Mathematics
Combining Two Class Averages Means Counting the Pupils Too
Learn why two class averages cannot always be averaged equally, using a worked example that keeps each group’s number of pupils visible.
Understanding Mathematics
Why Dividing by a Fraction Can Make the Answer Bigger
Use paper strips to see why dividing by one half gives twice as many pieces, then connect the picture to the reciprocal calculation.
Learning Mathematics
A Negative Number Squared Depends on Where the Brackets Sit
Work through the difference between a squared negative number and a negative sign outside a square, using brackets to identify the base.
Learning Mathematics
A Square Is a Rectangle With an Extra Condition
Help children classify squares and rectangles by their properties, using paper shapes, right angles and a simple sorting activity.
Learning Mathematics
Changing Units Does Not Change the Length
Use a measured ribbon and a simple conversion example to show why changing from metres to centimetres changes the number, not the object.
Learning Mathematics
An Equals Sign Describes a Balance, Not an Instruction to Calculate
Use counters and varied number sentences to help a learner see the equals sign as a relationship between two values.
Learning Mathematics
Zero Belongs With the Even Numbers: Show It With Pairs
Zero is even because it can be divided into two equal whole-number groups with none left over. Use pairs to make the idea visible to a learner.
Mathematics Practice
Why an Inequality Sign Reverses When You Multiply by a Negative Number
See why multiplying an inequality by a negative number reverses its direction, using a number-line example and a substitution check.