A practical volume investigation for KS2/KS3 pupils This lesson was used for an observation after the children had spent a week learning about volume. The children construct boxes and investigate volume by cutting different sized squares from the corner of a grid to find out which dimensions give the greatest volume. Lots of opportunity for discussion and reasoning. I delivered this lesson the day before Eid so linked it to party boxes, but it could be easily adapted! Differentiated 5 ways and includes IWB flipchart, activity sheets and worksheets.