If you are using a Cornelsen textbook (for English, German, Math, etc.), you will often see short alphanumeric codes (e.g., 55-67890 ) printed in the margins of pages or near exercises. These are not access codes for the whole book; rather, they are direct links to specific digital content.

If you have a new Cornelsen textbook, try the codes immediately to see if they unlock interactive content. If they lead to a paywall, check if your school or university provides the access codes separately.