We are incredibly grateful to the community for helping us make our textbooks the best they can be. Please report errors to support@ck12.org and include the following:

1. Complete book title or concept title.
2. Chapter and section where error may be found (please note, sometimes our pagination may be different)
3. List any landmarks where error may be found (eg: “it is just under the bar chart”)
4. Text of error in question and suggested remedy