April 23, 2015

Lesson, videos, exercises, and text from CK-12

- Mathematics > General
- Mathematics > Algebra

- Grade 9
- Grade 10

Make sense of problems and persevere in solving them.

Reason abstractly and quantitatively.

Model with mathematics.

Use appropriate tools strategically.

Attend to precision.

Look for and make use of structure.

Create equations in two or more variables to represent relationships between quantities; graph equations on coordinate axes with labels and scales.