Here is a Dancing Definition for the purpose of the quadratic formula. I put it together quickly during one of the NUA workshop days. I haven't used it with students yet becuase I am not teaching it this year. However, I have proposed to my trig students that they create and play songs for all of the core trig identities. Extra credit is involved if they record their tune and post it on YouTube. I will mention that my 5 year old was having difficulty memorizing our phone number until my wife and I set it to Lullaby. With the tune, he learned it immediately. I will keep the blog posted about the YouTube Trig Identity project. We'll see how it goes.
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