This topic was from a my favorite. Too much fun to not share.
121 – Ambiguous Case 
Brought out the compasses and rulers and had the Precalc H kids construct some examples to investigate ASS (ha ha) and it’s ambiguous cases. We were using law of sines, so this investigation (hopefully) helped in making some of the ideas involved a bit more solid.
A fun part of the activity was the need for a 30 degree angle. With the first class I had them trisect a 90 degree angle (corner of their paper) by using the two fold trick, similar to folding a pamphlet. It ended up not working that well, their angles varied widely. So with the second class I had them create an equilateral triangle and bisect an angle. They were far more consistent and accurate with this method.
120 – Trig Mobile update 
What does the following data from Trig Mobile tell you?
119 – Trigonometry Mobile 
You are interviewing at a toy manufacturer, you need to come up with a shape to balance the following mobile.
(BTW, no guidance or motivation required. Just some simple rules and boundaries.)
Before they were able to actually try their shape out on the mobile, they had to analyze another groups shape. They had to write up a quick Quality Assurance document describing the performance of the other group, along with a prediction.
Sadly my original mobile setup was error prone, but the technique was improved with … more binder clips.
Subset of skills used/required:
118 – Polar and Parametric in Desmos 
We’re working with Polar and Parametric Functions in BC Calculus. Desmos does a great job with each, but it’s nice to have a moving point to refer to so that the students can “see” the graph being drawn out.
Click either picture to go to the live Desmos page.
Here’s a polar example (by using the parametric version of polar equations!):
And here’s a parametric version:
Edit: Desmos responded with an improved approach!
116 – Homework for Pre Calc H
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115 – Raspberry Pi
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No joke, a group had a blinking led (from python code) in less than 15 minutes after playing with the raspberry pi. Pretty damned cool.
Half the class is working in groups of 3 with a raspberry pi, playing around and seeing what they can do. The other half of the class is making a game in Greenfoot. We’ll switch groups after a week.
114 – blank
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Sigh.