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"The portal comes equipped with a dynamic and interactive textbook, lesson plans aligned to the common core standards, and many other supplemental materials for your courses, including Wolfram Demonstrations, widgets, and videos. The Education Portal currently contains full materials for Algebra and partial materials for Calculus, but will continue to grow and improve with your comments and feedback. We developed the interactive textbook by working with the CK-12 Foundation, a non-profit organization with the mission to produce free and open source K-12 materials aligned to state curriculum standards and customized to meet student and teacher needs. The available Algebra textbook takes CK-12′s Algebra I FlexBook and makes it dynamic with our technologies."

Many students begin school with a love of math, but stumble when they reach algebra. With the increasing prevalence of mobile learning, though, on-demand apps and resources can help students stay on top of their algebra lessons. Here, we've gathered a handful of algebra apps summarized on APPitic.com, an app resource site with more than 6,000 apps in more than 300 subcategories.

Scratch is a free programming app (it's already on your computer and all the kids) that comes from MIT (scratch.mit.edu) that would be a great teaching tool in math.  Larry, I mentioned this to you a while ago, but here it is!

"secretly teaches kids algebra"

The Problem Generator - which is available to all Wolfram Alpha Pro subscribers now - creates random practice questions for students, and Wolfram Alpha then helps them find the answers step-by-step. Right now, the Generator covers six subjects: arithmetic, number theory, algebra, calculus, linear algebra and statistics. The difficulty of the questions can be tuned down for students in elementary school and tuned up for those in college calculus classes. As the company notes in today's announcements, the material for students in elementary and secondary schools closely follows the Common Core Standards initiative.

GNU TeXmacs is a free wysiwyw (what you see is what you want) editing platform with special features for scientists. The software aims to provide a unified and user friendly framework for editing structured documents with different types of content (text, graphics, mathematics, interactive content, etc.). The rendering engine uses high-quality typesetting algorithms so as to produce professionally looking documents, which can either be printed out or presented from a laptop. The software includes a text editor with support for mathematical formulas, a small technical picture editor and a tool for making presentations from a laptop. Moreover, TeXmacs can be used as an interface for many external systems for computer algebra, numerical analysis, statistics, etc. New presentation styles can be written by the user and new features can be added to the editor using the Scheme extension language. A native spreadsheet and tools for collaborative authoring are planned for later.

for Math 7, M+ and 8? Scratch makes it easy for students to animate concepts and explain them 

This is an interesting idea about how to do group work in math.

A great tool that puts an overlay on graphs, so you can manipulate data and make adjustments Jeff found using Geobra

Very exciting - Wolfram organized by Common Core Standards Wolfram Education Portal, organized by course. In the portal you'll find a dynamic textbook, lesson plans, widgets, interactive Demonstrations, and more built by Wolfram education experts. You can take a look at the types of materials we offer below, but to get full access to all materials, you need to sign up for a free account.

Basically, you can type equations into the Google search box and it will show the related graph - super easy way to show visually!

CK-12 Foundation provides a library of free online textbooks, videos, exercises, flashcards, and real world applications for over 5000 concepts from arithmetic to history