engages the pupils in both arithmetic relationships between numbers, multiplication facts and spatial awareness. It is a very challenging activitiy and probably should only be presented to pupils who feel confident about such investigations.
A bit of preparation beforehand will be useful - make a box following the idea in the instructions. It is best to have a square card that has had the corner pieces cut ready for gluing and another in which the corners have been glued and you have suitable covering paper cut to exactly the correct size as one sheet.
Perhaps rather like this:
Talk with the pupils about the three pieces you have and then gradually introduce them to the actual challenge, emphasising that they decide on both the size of the card to start with, and the size of the four corners to be used to fold round to make the "walls" secure.
They may need reminding that they are to find many (if not all) the possibilities.
What have you done to decide on the size of your starting square card?
How are you finding out how much paper you will need to cover it?
You've made some that were too big/small how are you adjusting your numbers to get it within the limits?
Apart from the obvious equipment (paper, card, ruler, calculator) no further support should be needed, as this is designed to challenge the confident pupil.