Choose the calculation that matches joining, changing and comparing.
What it is about
Choose addition or subtraction for combine, change and comparison stories within 20.
Year 1 · 5–6 years · 30 challenges
Before you begin
- Count small sets and compare familiar objects.
What the class will do
- Choose and explain · 30 challenges
One-step stories
Choose addition or subtraction for combine, change and comparison stories within 20.
Using it in class
Teacher reads each complete story and all calculation choices. Ask what is known and what is being found before calculating. Counter models are optional. A story may use more while asking for a difference; choose from its meaning, not a single keyword.
Give everyone time to think and discuss before one pupil acts at the board. The class explains and confirms together; hints and explanations stay until you move on.
Use an up-to-date browser on a computer connected to a whiteboard or shared display. Touch, mouse and keyboard; optional audio and reduced motion. No pupil accounts or personal devices.
Choose from 5 challenges up to the full activity. Discussion determines the duration: you set the pace.
Teacher Pro access includes all 30 challenges, interactive materials, hints and explanations for this activity.
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