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An Engineers Quick Algebra Reference

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New to Squarehead Teachers? Welcome! :-) Connect with me via Facebook, Pinterest, Bloglovin’ or Twitter! When I first heard about this article, I was amazed. What? Not teach kids to memorize …

I know that differentiation is SO important. I know it is the right thing to do. But sometimes it is SO difficult to make sure I am meeting the needs of all learners. Right now we’re pluggin…

"Be kind whenever possible. It is always possible." ― Dalai Lama

I've been meaning to share this foldable for a couple weeks now, but I finally decided to do it now because I was just on Pinterest and noti...

Observe... Flip down the finger that corresponds to the angle whose sine and cosine you need. The number of fingers to the left gives you the sine, and the number of fingers to the right gives you the cosine. So if you flip down your index finger which corresponds to 30 degrees... there is one finger to the left. $sin{(30)}=\frac{\sqrt{1}}{2}$ and there are three fingers to the right. $cos{(30)}=\frac{\sqrt{3}}{2}$ Try it for the fingers that correspond to the other reference angles. For…

COOL

Trig identities are a bear to memorize. But with this color coded free download, they're just a bit easier!

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Can your students remember standard reference angles in radians? Use regular counting and this animated graphic to help them!

Prime Suspects

Now you can do more than just type "HELLO" upside down. Here are six fun things to do with your graphing calculator.

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