MATH
Ken Ken
*Sudoku-style puzzles invented in 2004 by a Japanese math teacher that
mix logical thinking and basic arithmetic (super-addictive and fun)
Khan Academy
*In my opinion and the opinion of most of my students, the videos are
not terribly helpful, but the "PRACTICE" area that automatically
generates and corrects math problems can be extremely useful
A
Mathematician's Lament
*A beautiful summary of the sorry state of math education and education
in general from a brilliant math teacher
MUSIC
Ultimate
Guitar
*chords, lyrics, and guitar tabs
for tons of pop music (WARNING: charts
can contain lots of mistakes)
IMSLP
*wiki format website with scores
and recordings of nearly every
classical composition in the public domain
TECHNOLOGY
Scratch
*MIT's computer programming
environment for kids. Download the program for free, and learn how to
code by stacking command blocks on top of each other. Scratchers share
and remix their work on the Scratch website similar to the way in which
the youtube community interacts.
TED
*Informative
talks on all natures of information from technology and science to
entertainment and sociology