[plt-scheme] answers from htdp

Sorry, no, the passwords are for professors only.
But you can get lots of help on forums like this or
the comp.lang.scheme newsgroup if you demonstrate
that you really are working through the material
yourself, not just asking people to provide you with
answers.

Our newer material, here --

  http://world.cs.brown.edu/

-- comes with public solutions to some of the materials
to help self-learners like you.

Shriram