KHAN ACADEMY
Khan Academy has one of the deepest libraries of video learning tools guiding you from the very basics of mathematics deep into high level university mathematics. They have have been around for many years now and have implemented some great gamification tools that make learning fun. Earn cool achievements and all sorts of points to help you through the grind. HIGHLY Recommended!
ENGAGE NY
Engage NY is a great way to keep up with what you/your kids are learning by being able to access every single lesson required for the New York Common Core Curriculum from Pre-K to Pre-Calc! Missed class? No problem, just look up the lesson you missed and you are good to go. Zoned out for a seccond and missed something important? No problem, it's all there for you to look up any time. HIGHLY Recommended!
MATH IS FUN
Math is fun gives you access to a plethora of different topics explained in great detail using visual tools that are a huge plus in helping students understand each topic to the core. Each section ends with 10 questions that you can use to practice and make sure you truly understand the topic you just learned. HIGHLY Recommended!
JMAP
If you are studying for your Regents examination, then you have hit the Jackpot with JMAP. This site gives you access to thousands upon thousands of regents materials and sample questions. Any subtopic on any of the regents examinations have nearly one hundred (sometimes more) example problems and answers. If you need more practice for regents then look no further then JMAP! HIGHLY Recommended!