Here shows the websites offering open textbooks at primary and secondary levels. You may choose the websites based on the disciplines they purposed for. Here is a chart helps you to source open textbooks from these websites:
|Many resources of the designated category are available|
|Some resources of the designated category are available|
|No resource is available in the designated category|
The table below is for reference only. The availability of resources in these websites may subject to change.
|Websites for open textbooks at primary and secondary levels||Discipline|
|California Free Digital Textbooks Initiative
(as at 30 July, 2013)