"Something like Windows Journal"

[Mattbook]

Anybody know of a piece of Mac software that would provide the same functionality of Windows Journal? I have a teacher whose just switched to a Mac in his classroom.. He used to use a Windows XP tablet for his lessons so he could organize things on screen, do little diagrams and whatnot.

Ive been looking around and Ive found a lot of great PIMs but nothing that would allow him any sort of free draw..

Thanks,,