You possibly might already be familiar with The Compleet Molesworth, but if you're not, it is a helpful field guide to the ecology of St Custards prep school circa 1958. It's narrated by Nigel Molesworth: the "curse of st custards" and "gorila of 3B". Chapters in the book include: Boo to Sir or are Masters Nesessessary?, Lessons and how to Avoid Them and Ho for the Hols. Actually, it's a very funny book written by Geoffrey Willans and illustrated by the master illustrator Ronald Searl. Below is an extract from the book about masters.
All images form The Compleet Molesworth.