This is a whole lesson including tasks and presentation.
Over arching concepts in biology.
The lesson is part of a series of lessons that cover topic one of the new GCSE (to be sat in 2017).
There is a focus on a creature called Demodex, a parasite that lives in 17% of the populations skin pores. The lesson stresses the differences an advantages and disadvantages of light vs electron microscopes.
The lesson features a hinge question to determine students ability which leads into a Cloze activity for lower ability students or an open ended research task for the higher ability.