Some interesting educational research findings from ScienceDaily, and reported over at the UK Whizz Blog.
Summarized for your reading pleasure:
Learning with different mathematical methods, using old and new media, and with a teacher to tie it all together, gets the best results.
And so you have it! Math-Whizz has a huge variety of material, encourages pencil-and-paper methods, and facilitates parent-student-teacher communication. A no-brainer.