Stage: 2 Challenge Level:
Why do this problem?
This problem provides an unusual and challenging context in which children can explore transformations. It will help them use appropriate language to describe transformations, and it will also develop their dexterity with using a computer mouse.
Ideally, it would be good to have access to a suite of computers if working on this with a group. You might like to introduce the problem by asking a child to come to the front of the class. Ask the child to stand facing you and invite them to move their hands slowly in some way. As they do this, copy what they do but imagine there is a mirror between the two of you so that you are effectively
making a mirror-image of their movements. Ask the rest of the group to explain what you are doing.
Then show the class the problem, perhaps on an interactive whiteboard, and help them understand what they are trying to do. If possible, try to keep your instructions to a mimimum at this stage so that the children are encouraged to explore the interactivity for themselves. Then suggest that they have a go at the problem, maybe in pairs, at a computer. As they work, you might want to use the
hints as questions to push their thinking on.