2nd String Videos - a bit more on the fringe of the topic
more videos to come...
Animations/Simulations - the ability to show motion is huge. These are great teaching aids. Be sure to click around and click-and-drag on stuff, as these are pretty interactive.
Lecture note videos - not super-exciting but very functional to relay the basics
Sun's Path/Seasons Lab [GazdonianProductions]: I was not happy with the standard lab for this, I came up with this one. This is an quick overview to help teachers who may want to make their own version.
3 min 37
Sun's Movement & Shadows Lab [GazdonianProductions]: Wanting to make seasons and Sun's motion more hands-on, I developed this lab station where students manipulate 3 work lights and relate them to the sun's path. This particular station has been a "teachable moment machine" for me, as I've spent so much time over the years standing at this station with students discussing this scenario with them. Highly recommended.