It easy to embed Workspaces into Schoology. To do this, from the Courses dropdown, select > Create a course
Then, from Materials select > Add Materials and select Add File/Link/External Tool
Click on the External Tool option.
Add in your title and the Public url Workspace link
This will embed your Workspace. When you view your Materials for the Course, click on the Workspace link and you will be able to view the Workspace within Schoology.