Here are links on this blog specifically about teaching writing–mostly creative writing–to high school students.
Writing Activities
Exquisite Corpse (examples here)
Sound Poems (starting with pre-word sounds)
Poetry Bingo (select words randomly, make into poems)
Magpo.com assignment. (uses magpo.com)
Creatively Translate a German poem into English, with revision ideas (some from this book.) I believe I read someplace that John Ashbery has his poetry students do a similar activity.
A “Creative Writing 1” course calendar from 2016
Concepts of Creative Writing
MonkeyMoonMachine 
I like your links, young man.
I think you’re in the US? Have you seen this Poetry Trust Toolkit? http://www.thepoetrytrust.org/images/uploads/pdfs/Toolkit%20for%20Teachers.pdf
Full of handy hints.
Thanks for the tip! I’ll check it out.