timzsta - where on Earth were you taught to instruct? Please advise, so that others might avoid the place!
The glide circuit is the last element of the PFL - not the other way round! Teach glide circuits first, PFLs once the glide approach has been mastered.
As for 'approach plates' and 'navaids' for an early student to find an alternative aerodrome, you must be barking mad. They'd probably kill themselves trying. If a student on an early solo comes back to find the aerodrome unexpectedly closed, then that's an emergency diversion requiring positive, gentle guidance all the way elsewhere.