Helpful Resources
There is a wealth of information available about effective teaching, both as published texts and on the Internet.
Here are a few books that you might want to consider.
Cooper, Damian (2007). Talk About Assessment, Strategies and Tools to Improve Learning. Toronto, ON: Thomson, Nelson.
Davies, Anne (2007). Making Classroom Assessment Work. Courtney, B.C.: Connections Publishing.
Hume, Karen (2007). Start Where They Are: Differentiating For Success With The Young Adolescent. Toronto, ON: Pearson Education Canada.
Marzano, Robert J (2003). What Works in Schools: Translating Research into Action. Alexandria, VA: Association for Supervision and Curriculum Development.
Marzano, Robert J., Pickering, Debra J. & Pollock, Jane E. (2004) Classroom Instruction that Works: Research-Based Strategies for Increasing Student Achievement. Alexandria, VA: Association for Supervision and Curriculum Development.
Tomlinson, Carol Ann (1999). The Differentiated Classroom, Responding to the Needs of All Learners. Alexandria, VA: Association for Supervision and Curriculum Development.
Tomlinson, Carol Ann (2001). How to Differentiate Instruction in Mixed Ability Classrooms. Alexandria, VA: Association for Supervision and Curriculum Development.
Some helpful web-based resources are:
Differentiating math instruction
Differentiating science instruction
Howard Gardner's Multiple Intelligences
Ministry of Education Capacity Building Series, differentiating math - PDF 
Robert Sternberg's educational theory
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