Math Yellow Pages is a free Math directory Math worksheets, Math lesson plans, Math games, Math videos, and Math Power Points for Algebra, Geometry, Measurements, Numbers and Data, and Statistics for 1st grade, 2nd grade, 3rd grade, 4th grade, 5th grade, 6th grade, 7th grade, 8th grade, 9th grade, and High School.

7th Grade Math - Problem Solving is an area where students learn to apply math, including algebra and sometimes geometry to everyday type of problems that often come in the form of word problems.

This is a very nice game that teaches students how Math is used by professionals. The student becomes the professional and have to make the decisions about the price and quantity. Online game - 7th and 8th grades

Math teasers are questions to challenge your thinking skills. Interesting math questions - not too hard but enough to may most people think.
Grade: 4th, 5th, 6th, 7th, 8th
Domain: Numbers and Operations, Algebra, Geometry, Data Analysis and Probability, Measurement, Problem Solving
Type: Puzzles, Logic Questions, Quiz, test

More games on graph are a collection of games that can be played indoors and outdoors with some type of grid. Problem solving 5th, 6th, 7th, and 8th grades

Nasa Kids' Club is a place where students can build rockets, explore science and sequence objects in a fun, entertaining way. Students will have to put their thinking caps on. They may need a little help with teachers or parents at first, but then they will get the hang of it and really enjoy it. Many of the activities on the site is doing math without the numbers.
Grade: 4th, 5th, 6th, 7th
Domain: Problem Solving
Type: Activity

QuickMath - solves the math problem for you! Yes it solve ths problem. The software, for free, solves algebra problems, factors, and expands.
Grade: 7th, 8th, 9th
Domain: Algebra
Type: Help, Tool, Tutor, Problem solver

World Math Word problem solving for 6th and 7th graders
Number Theory
Measurement
Geometry
Patterns, Algebra, and Functions
Data, Statistics, and Probability