FreeRice.com
Addictive vocabulary game! And it's for a good cause: for every word you get right, the site donates 20 grains of rice to help end world hunger.
Live Homework Help
Connect with a tutor one-on-one for free help with your homework! Available to students in grades 4 and up, 2–10 p.m. daily. En español, Domingo a Jueves de 2 p.m. hasta 7 p.m.