"Mr. Robb's Math is a YouTube channel containing 555 videos produced by high school mathematics teacher Bradley Robb. Mr. Robb's videos explain and demonstrate solving problems in Algebra I, Algebra II, and Calculus. Most of the videos are recorded while Mr. Robb is teaching. You can find the videos on the Mr. Robb's Math YouTube channel or visit Mr. Robb's website WowMath to find the videos organized in sequence with accompanying screenshots."
The next generation of the graphing calculator. Using a powerful and blazingly-fast math engine, the calculator can instantly plot any equation, from lines and parabolas up through derivatives and Fourier series. Data tables open up a world of curve-fitting and modeling. Sliders make it a breeze to demonstrate function transformations. As browser-based html5 technology, the graphing calculator works on any computer or tablet without requiring any downloads.
Check out the activities on this site, which give students immediate feedback. I looked at the math activities for Algebra/Geometry. Students can test their understanding of concepts quickly using this platform. Check it out!
"Math Time Attack! has Flashcards, Quiz and Test modes to help learn and recall multiplication, division, addition and subtraction with an emphasis on speed and accuracy."