Hi there,

If you've added the Imagineering course (listed under Storytelling) as a course for your class, you should be able to find it again by clicking the "Assign" tab on that class page on your Teacher Dashboard. 

From there, you can check the lessons you want to assign and click the blue assign button. If you'd like to assign the rest of the course, you can adjust the due dates accordingly when assigning them.

I hope this helps! Please let me know if you have any further questions.