We’d like to hear from you, whether you have found a mistake, have an idea for a new lesson, or have a question about the site.
We read every message and aim to reply within a few working days.
Helpful things to include
- For a mistake in a lesson: the page address and the example number.
- For a problem with the Slope Finder: the two points you used, or a description of the graph, and the device and browser you were using.
We can’t do homework for you, but the lessons and practice problems are there to help you work through it yourself.