Graphic organizers are visual representations of a text or topic. Organizers provide templates or frames for students or teachers to identify pertinent facts, to organize information, and to record relationships between facts and ideas within a learning task. Literature helps support the use of organizers to facilitate and improve learning outcomes for a wide range of learners. Overall organizers portray knowledge in a meaningful way which helps bring clarity to ideas as connections are made.
There are three great sites for graphic organizers in math:
http://www.enchantedlearning.com/graphicorganizers/math/ is a great tool for different cloud, tree, venn, and pie charts you can use these are free printouts and even come with concept diagrams for geometric figures, LCM and GCD, as well as easier ones for addition and multiplication.
http://www.dgelman.com/graphicorganizers/ are for upper level graphic organizers for algebra, geometry, calculus, and generic organizers. They have ones for functions, graphing, and even quadratics and matrices. This one is highly recommended!
http://www.sw-georgia.resa.k12.ga.us/GO%204-8/4-8%20GO.htm is free word documents that you can alter for different concepts involving algebra such as area, graphing, and measurement. It also comes with good geometric organizers for Pythagorean, quadrilaterals, ratio, similarity, and congruence.