[plt-scheme] Teachpacks menu in DrScheme 370

Hi, I recently installed DrScheme 370 for MacOS X (10.4 Tiger) and for
some reason I can not find teachpack item in Language menu (or
anywhere else for that matter).

I dragged the whole PLT scheme folder to application folder. I
certainly remember teachpack item in PLT scheme 360 for Linux. Am I
missing anything or I managed to screw up my installation in some
subtle way?

I have teachpack folder in plt scheme folder.

Thank you!