The following activities are ideally aimed at 11 to 14 year olds (Years 7-9, KS3) but they can be modified to cater for the younger age groups or used as extension material for the more able KS2 pupils.
Teachers and educators might find it helpful to look at Primary School Resources where a general introduction to fungi is given.
Polyporus squamosus: The Dryad's saddle (photo © ama)
Activity 1: Build a tree
Activity 2: Mushroom Murder mystery
Activity 3: Foraying using a key