Estimating Numbers: Year 1 Maths
We Are Learning To (WALT): Estimate quantities of objects and numbers within 50 Making clever guesses about how many things we see
What is Estimation?
A clever guess about how many things are there We don't count each one We use our eyes to help us guess Then we check by counting to see how close we were
Estimation Station Challenge
Visit 3 estimation jars around the room Look carefully at each jar Write your guess on your whiteboard Count to check how close you were Compare with your friend's estimate
Helpful Estimation Strategies
Look for groups of 10 Use the number line to help Compare to amounts you know Is it more or less than 25? Think about handfuls or small groups
Quick Fire Estimation Challenge!
I'll show you some objects quickly Write your estimate on your whiteboard Remember - it's a clever guess! Let's see who gets close to the real number
Success Criteria - Can You Do This?
I can make a sensible guess about objects up to 50 I can explain if my estimate was too high or too low I can check my estimate by counting I can compare estimates and say which is closer