I first heard about these two videos from this Tech the Pluge post, but what isn't mentioned there is that there are more videos that can be found. Additional Videos: Getting Triggy Wit It and Teach Me How To Factor Additional Videos:  Facebook for Math Nerds, Glee for Math Nerds, The Tonsil Hockey Team
I'm learning new things about the TI-Nspire everyday.  This video is from the people over at Tech Powered Math:
This is simply another consequence of my poking around the web, and although I haven't taught trigonometry since last summer, I would consider using either of these ideas in the future: 1.  Touch Trigonometry - This is an interactive trigonometry graph and circle featuring the six basic trig functions.  I wasn't a fan at first because I'm colorblind, which made it seem like there was just too much going on, but I can see that it is a useful tool for those who are able to distinguish colors. 2.  Serving Unit-Circle Trigonometry on a Paper Plate - At first I thought…
A few weeks ago a colleague of mine was in need of an activity for Factoring.  He was ahead of his pacing chart and wanted something to fill up some class time with.  I referred him towww.ilovemath.org, which has hundreds of free activities to download.  Here is a list of a few that I have successfully used the in the classroom:Solving Equations Writing AssignmentTwo-Step Equation Concentration Partner Problems SlopeLinear Relationships Sudoku Wartime Battle (Solving Systems of Equations)MATHO! Logarithm Game Cutout - FactoringPowers of i (This is a student favorite) Unit Circle Trigonometry (Follow the White Rabbit)The Game of Greed (Basic Statistics)