This activity engages the pupils in both a spatial and numerical context. It challenges their ability to see symmetrical reflections. It also gives them the freedom to choose how they go about the task - visualising in their head, using pencil and paper, beads, cubes or other counters that they have requested, and/or making use of a spreadsheet. They
can learn a lot from adopting one method and then realising that an alternative method might be better.
Use open questions such as "tell me about this ..."
How did you decide on this approach to finding all the possibilities?
Explore the differences between this challenge and when the bracelets are like a non-reversable necklace.