http://www.learner.org/resources/series140.html#
LEARNING MATH is a series of 12 or so video lessons from classrooms and teacher education programs. These videos are part of a professional development series created by the Annenberg foundation asssociated with the NCTM content standards exploring the "big ideas in algebraic thinking, such as finding, describing, and using patterns; using functions to make predictions; understanding linearity and proportional reasoning; understanding non-linear functions; and understanding and exploring algebraic structure." These are nice case studies to watch if you need a different perspective on the math you are teaching or if you are wanting some pedegogical depth to a lesson.