Discovery Education: Homework links for most curricular areas, including computer science, English, foreign languages and math.
Bartleby: A website with searches of familiar quotations, phrases and proverbs:
Fact Monster: Online thesaurus, dictionary, atlas and almanac.
Desmos: Online graphing calculator that provides a basic, easy-to-use, well-balanced set of graphing functionality for algebra, pre-calculus, calculus and beyond.
WolframAlpha: Free online access to a computational knowledge engine. Answer questions, do math, instantly get facts, create plots, calculators, unit conversions, scientific data and statistics , help with homework and much more.