Patty, my best wishes for your high school class - great that they are going
to learn about breastfeeding well in advance.

I have talked to several high school classes over the years. One girls-only
school invites me every year to talk to their Lower and/or Upper VI students
(60 - 70) but one year I talked to 200 Sixth Form boys and girls from a
government school and some of these students were over 20 years old.  Mostly
I want to tell them how well breastfeeding works, given half a chance, so I
invite them to interrupt me with any questions/comments as we go along, then
start off with the "mechanics" (which I personally find so fascinating!)
including positioning with doll and model breast, a bit of endocrinology, a
little about Code issues and the differences between breastmilk and the
Other Stuff, and take it from there. After 15 minutes or so the questions
start coming and I have always found these to be the most challenging I have
ever received from any source (!), but they can be "used" to present the
info you want to get across.  I find that the kids are very keen to
ask/comment about contentious issues like breastfeeding in public, long-term
nursing (> 18 mo, which I present as "normal") HIV, breast implants/surgery,
immunological benefits of breastfeeding, and how to manage "problems" that
friends/and family have experienced like sore nipples, engorgement,
"not-enough-milk", which covers the physiology. An hour slips by very easily
and everyone seems to have a good time!  Usually several of the girls want
to ask personal questions at the end of the talk after the others have left.
At the girls' school the students have to write an essay afterwards about
what they learned.

I find schools talks *very* challenging, and a lot of fun!  Best wishes with
yours.

Pamela Morrison IBCLC, Zimbabwe