Mobymax.com (K-8 math and literacy skills)
Graphic organizers:
https://www.eduplace.com/graphicorganizer/
Handbook of Useful Strategies for Engaging Students:
https://www.saddleback.edu/uploads/la/rl/handbook_of_useful_strategies_for_student_engagement.pdf
Tools for Reading, Writing, and Thinking:
http://www.greececsd.org/academics.cfm?subpage=478