L.O.: To estimate the area of irregular shapes.
Draw around your own hand on a piece of cm2 paper. You are going to measure the area covered by your hand. What do you think it might be? Agree a range and then find the area by counting the squares. How do you take the partial squares into account? You may use different strategies, such as only counting those that are more than ½ of a square, grouping partial squares with others to make whole squares or rounding partial squares to 0, ½ or to 1.
Activity
See worksheet attached. Order leaf shapes according to estimates of area. They then count squares and half squares to find out the area.
Outdoor Learning Potential – Collect leaves from outside to draw around, estimate and count area.