How to save time lesson planning

Recently, I was reviewing some old training course notes, and came across this gem of a lesson planning tip from a friend:

If you look closely, the course books repeat on a unit by unit basis. What this means is that you can usually use the same lesson structure for the start of Unit 1 (i.e. the initial presentation of language) as you do for Unit 2, 3 , 4 etc. once you know what you’re going to do in this lesson… its actually a ‘presentation of language routine’, although the students may not remember it, you don’t have to really plan it – its already planned from the first time you did it. This is called block-planning and is one of the most useful realisations I ever experienced .