Watch this video to review how to calculate the volume of a prism. Start from the 50 seconds mark to the 3 minutes and 50 second mark. Discuss with your partner what this video has in common with the prisms that you made with blocks. Do the activity set, share how you calculated it with another pair[br]

Create a rectangular prism using the slide scales on the right. [br]Firstly, make a prism which is 1 unit cube high. This is one layer, the same as the one you made with blocks.[br]With your partner identify the number of cubes in this layer. Explain how you calculated this. [br]Create another prism by adding a new "layer" onto your prism. What is the same? What is different? How many cubes make up the volume? Explain your calculations. [br]Create different prisms, calculate and note your calculations next to a screenshot of the prism.

Using the slide scales on the left, create a prism with the height of one. This is equal to a layer of one blocks you created in the previous activity and the prism you made with blocks. Picture the number of blocks in this one layer. How can you calculate the volume of the prism? Explain your working. [br]Add another "layer" by increasing the height to 2. What is the same and what is different? How will you calculate the volume for this prism? [br]Add more "layers" by increasing the height. Calculate the different volumes, explain your working.