It was in the context of: “Me and Mrs. Burcher are concerned about behaviour.”
As soon as possible, I deliberately used a sentence in which I included the teaching assistants (no degree required!), who were present at the time, by saying, “Mrs. Connor, Mrs. Ecclestone and I would like.......”.
Both of those ladies understood exactly what grammatical point was being made.
On another occasion, the same irritating teacher had reason to speak to me about selecting pupils for a particular purpose.
She addressed me thus, ”Have you chose the children yet?”
Not believing what I was hearing, I replied, “Pardon?”
Which resulted in a shouted response, “HAVE YOU CHOSE YOUR CHILDREN YET?”
You rightly say that there is confusion over the use of these personal pronouns which can result in people using “myself”!!
That is a whole other issue!