Curated OER
Slope
A nicely put together basic introduction to slope. Slope is defined, and explained. The formula for calculating slope is shown and there are practice problems. There are questions about horizontal and vertical slope, as well as lines...
BW Walch
Solving Systems of Linear Equations
Solving systems of equations underpins much of advanced algebra, especially linear algebra. Developing an intuition for the kinds and descriptions of solutions is key for success in those later courses. This intuition is exactly what...
University of Texas
A Library of Parent Functions
Don't think this lesson is for Mom and Dad; parent functions are all for your high schoolers. Flip through a presentation with a focus slide on each type of graph and its characteristics. Some examples are included but the focus is on...