T : Which one do you think they're meaning? Why are they calling it a squared prism do you think, not a rectangular prism? (Phillip, Tim, Sean, and Erica put hands up)
Tim : The mint creams.
T : Pardon?
Tim : The mint creams because they've got a erm square on the…
T : On the base and the top of it? I think they're referring to the Smartie box now... cos it's got a square base and a square top whereas a rectangular prism has got rectangular sides all the way around it. Out of those two the mint creams box is a rectangle and the Smartie box is the square isn't it? So I actually think that's what they're after. I think they're after the Smarties for that one. Now I don't want you to draw the net. I don't think you need to draw the net. All you need to do is tell me what it is. (pause, Daniel puts hand up) What is it? Can anyone tell me what that's gonna become?
Daniel : That? (pointing to yellow net) (Tim puts hand up)
T : No the green one. What kind of shape is that one? Sian? (Ben puts hand up)
Sian : A rectangular prism.
T : A rectangular prism. That's all you need to write for that. So for number seven just write rectangular prism. (Black, 2004b, p. 9)