- If you have purchased the hybrid edition, the code you need to enter can be found in the manual:

When you open the book, on the back cover, you'll find all the information you need to access the Campus Difusión platform, as well as the access code, as you can see in the screenshot below.

You need to scratch the silver-gray field shown in the screenshot below to see the code.

To activate the content, click on the Contents tab, then on the blue + Add code button and enter the code.

- If you purchased access to the digital textbook: Once the purchase was made, you should have received an email with the subject line “Código de acceso/licencia Campus” containing a code. If you have not received it, we invite you to check your spam folder.

- If you have purchased only the printed manual, to activate the free resources associated with the manual (audio tracks, videos, etc.), you need to enter the ISBN code on the back of the book.

To activate the content, click on the blue + Add code button, and enter the ISBN code you'll find at the back of the student's book.

If you already have contents activated or expired on your account, to activate the content, click on the Contents tab, then on the blue + Add code button, and enter the ISBN code you'll find at the back of the student's book.

Do not add any spaces, hyphens or other punctuation marks between the numbers in the barcode.

No need to enter exercises textbook ISBN code. By entering the student textbook ISBN code, you have already activated all available resources for both on your profile.

​If you are still unable to activate it, please contact us with the complete name of the textbook and include a picture of the code you are trying to enter.