Just to create some graph plots, here
Or, trying to write mathematic symbols on a web page? Here is the online Latex tools
nice.. you can also try this free Math and other subjects for elementary students here:
I haven't seen it mentioned so here we go:
Yes its one of the best math software . It has an android version too that, unfortunetelly, is not compatible with my tablet/android device...
Hi! i came accross with this site and it is quite good. Try it out. This mightbe your looking for.
you have Math, English and Science on this site http://selfquiz.org/free-quiz
For students Elementary level from Grade 1 to Grade 12
If you have any kind of problem check http://math.stackexchange.com/.
It is a very friendly and by now huge community and they cover every aspect of math from school to college to research level.
If you're looking to gain an intuition for math, I highly recommend BetterExplained. Other sites I tend to come across only exist to help you do your homework and, frankly, the way math is taught (at least in the States) is quite robotic. Sure, you can manipulate numbers, but you rarely learn why it all works. The learning philosophy the creator adheres to is ADEPT, which stands for:
Analogy - Tell me what it's like
Diagram - Help me visualize it
Example - Allow me to experience it
Plain English - Describe it with everyday words
Technical - Discuss the formal details
As someone who enjoyed math growing up, I often resented my classes for not taking this approach.
And if you need to understand a specific concept, Stack Exchange (as mcdorado mentioned) is fantastic. The math subreddit is also good if you need a daily feeding.
Symbolab is pretty neat, though, haven't seen that before. Actually seems to work better than how I remember Wolfram Alpha working.