We've finished the first unit, which was on real numbers. Unit two focuses on complex numbers and their operations, and solving basic quadratics with complex solutions.

I went through the main ideas with them about what imaginary numbers are, how the imaginary number line works, and multiplying imaginary numbers. I used the "multiplying by i = 90 degree rotation" idea that I wrote about before, and with the use of Keynote animations, it was even more effective. I really suggest using this method to teach about powers of i.

Here are the files:

Lesson 1 (Intro to Complex Numbers)

Lesson 1 Keynote

Keynote Quicktime

## Thursday, October 02, 2008

### Algebra 2: Intro to Complex Numbers

Labels: algebra 2, complex numbers, lesson

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