Digit Dog and Calculating Cat have been inspired by Steve Wyborney www.stevewyborney.com to create this estimation activity. 
Download the powerpoint here
Show the first slide and ask:
How many eggs are in the pot?
Take estimations and then reveal the answer.
Show picture 2 and ask the same question. Compare the pots – are there more eggs or fewer eggs? Take some estimates and then reveal the answer.
Show picture 3 but this time ask learners to write down their estimation and then to tell their partner why they chose that number. This generates mathematical talk and explanations.
I chose _____ because___________
I looked at pot __ and thought__________
I think __________ because_____________
Repeat for picture 4.
Digit Dog Challenges 