I have found that when a lesson doesn’t work, it is often because one or more of the fundamentals have gone out the window! In my humble opinion, omission of the fundamentals include things like the following: Do you agree?

No warmer - no atmosphere established! They were like zombies! Also, latecomers frustrated me!

No proper language input given -  necessary for sts to complete the task either before (PPP) or after (TBA). I just didn’t think it through!I discovered after the fact that they needed to know how to say something that I didn’t pre-teach…

No error correction. I forgot that!

Inadequate speaking opportunity for the student. I interfered too much! We ran out of time before I got my productive result…

No help with pron. Forgot that!

No adequate prep time given before I expected a speaking performance from them. (ie no pairwork/small groupwork) I failed to put myself in their shoes!

Blah, blah, blah! Teacher talks too much! - After all, it’s all about me!

No timing! No variety of task types! Boooring! - I couldn’t be bothered to find the materials!

This list is not by any means exhaustive but I do think these are cardinal sins, as it were.

One thing’s for damn sure - without thinking/planning, I find I’m bound to commit one of these sins! Whaddayafink?