I wonder what happened with the HP Prime lessons Plans?...

[gtspringer]

All the Lesson Plan documents are at the following URL:

http://hp-prime.vanillacommunity.com/

Just create an account and log in. All the AP Calculus and AP Statistics materials are there, as well as lesson plans created by teachers currently using HP Prime in their classroom. The Technology Corners you reference are meant as How-To documents and not lesson plans. But they will be updated in the near future.