The content will be not count on a mobile data allowance to help keep costs of online learning down.
Customers using BT Mobile, EE, and Plusnet Mobile can use BBC Bitesize content from the end of January without eating into their data allowance.
Bitesize provides structured lessons in maths and English for all year groups, as well as offering other curriculum material.
Content from other providers is likely to be made free in the coming days.
More mobile companies are expected to follow suit in making such content free to use.