Question

What does the saying "don't smile till |Christmas mean?

Answer 1

It's an old-timey thing new teachers are told -- so they will (hopefully) get control of their classes in the fall by seeming stern and strict! The thinking is that if a teacher smiles before Christmas, he/she is a pushover. Too nice!!

Answer 2

Thank you.

Answer 3

This site will explain that adage teaching adage.

http://www.educationsector.org/analysis/analysis_show.htm?doc_id=684282

However, remember that you will find many differences of opinion on its use and effectiveness.