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Hundreds of videos on high school math/science. They also have a YouTube channel.

Tutoriales en Inglés de varios cursos

A site housing more than 3000 educational videos

"DragonBox Algebra 12+ is a must-have tool for students so they can earn better grades and gain confidence in algebra and mathematics. It is based on the award winning game DragonBox Algebra 5+ but covers more advanced topics in mathematics and algebra: "

College Algebra Notes. Great Resource

Numerical Expressions vs Algebraic expressions tutorial

"A Full Year of Algebra Class on Your iPad"

Explains how learning algebra builds brain muscle and how to think abstractly.

Get the Math is a super website designed to provide teachers and students with Algebra-based mathematics challenges. Get the Math tries to put the challenges in the context of the "real world" scenarios of fashion design, video game design, and music production.

Algebra terms

Here is a list of all of the skills students learn in Algebra! The skills are organized into categories, and you can move your mouse over any skill name to see a sample question. To start practicing, just click on any link. IXL will track your score, and the questions will even increase in difficulty as you improve!

Practice quizzes! They have all sorts of topics and you can finish any time and it gives you the length of time you were in and how many you got right. When you get a question wrong, it tells you what the correct answer(s) are. Multiple choice practice! Can be used with the whole class to review or in teams when they finish an activity early (great for that since they can end any time).

Free worksheets available for all books in the series: addition/subtraction, multiplication/division, fractions/decimals, percents/ratios, pre-algebra/algebra, and geometry

Modules to take students through many concepts in Algebra. It includes introductory "hook" questions as well as videos to explain concepts. Some of the videos would be great to show in class to motivate the students! Also a great resource for students who need additional assistance. 

Explains how algebra is connected to physics and the world around us.

Free Math Help. Algebra and Geometry lessons online.

Teach algebra through video game programming

This great maths site has an amazing collection of maths self-marking problem solving questions. Search by age level or topic. This covers both Primary and Secondary levels. Topics include numbers, geometry, algebra, data analysis, probability and more. http://ictmagic.wikispaces.com/Maths

Shortcuts to math/science symbols and equations.

He said what?!

Not learning algebra means you have shut the door on many careers. Sure you can lead a good life without it, but you have limited yourself. Math phobics are always looking for a reason to justify/validate their choice to avoid math. Trying to make math seem irrelevant to life is a common approach. Imagine saying learning English is overrated - many get by just fine without writing or reading much of anything in their daily lives. In fact, why do we need any education?

It's an interesting article. The writer followed it up in his blog extending similar treatment to ALL subjects. It's more a treatise in how curriculum design and the current state of the system has failed society, rather than an attack on disciplines specifically. He actually has a STEM background, mind you.

A good maths game where you need to find the unknown numbers. Good as an introduction to algebra. http://ictmagic.wikispaces.com/Maths