Drive allows you to create web-hosted documents, presentations, forms etc. Each document can be linked to from D2L and centrally maintained (i.e. you can update the google document and it will automatically update within D2L). This can be useful especially if you are using the same material for multiple classes How to use
Recommended reading for adapting and authoring OER. Some content is campus specific. This comprehensive guide includes nuts and bolts details about authoring OER. It also contains a discussion of various formats for open textbooks and a helpful section about permission to adapt OER for those timid about borrowing or adapting content (see section titled "Permission to Adapt").