Using pictures for estimation Questions Which pictures work well for practising estimation skills? What makes them good pictures for estimation? Which pictures work well for promoting maths talk? What is it about those pictures that promote discussion?

How many rectangles can you see? How can you set about recording your thinking? How do you know that you have them all?

How many dots can you see? Explain how you got your answer.

How many bricks do you think there are in this picture? What will you do about part-bricks?

How many rectangles can you see in this picture? How can you record your thinking ?

How many windows do you think there are? How do you know?

How many rectangles can you see on this hot air balloon?

How many leaves do you think there are in this picture? How can you convince someone else of your answer?

How many bricks do you think there are in this picture? What will you do about part bricks?

How many little squares do you think there are on these four chairs How many little squares do you think there are on these four chairs? Use the next picture to see how accurate you were.

Tell your partner how you estimated the number of squares.