Possible Clues:

• Period of instruction pupils may have in hot weather?
• Period with fewer commitments?
• Teaching session or Bible passage
• Not so much on to get this in class
• Primer unit
• Not so wearing for the pupil
• Class session or reading from Bible
• Pointless not including tip for students in class
• Is the boy your boy? That' what you've got to learn
• How you learn to have minus nothing over the North