There are a real variety of treasure hunt resources on TES – and these are great for adding a bit of momentum to a lesson.
1a) Find the Treasure is a IGCSE activity for using loci and constructions to find the buried treasure.
2) Pirate Treasure Hunt is an IGCSE activity testing using and applying SOHCAHTOA to word problems.
3) Round the classroom treasure hunts are a good way of getting students off their seats. There are a large number of KS3, IGCSE and IB resources listed on TES.