Add support for copying a lesson plan to a teacher’s classroom course page

[lukesanantonio]

These other features come to mind / might make integration easier.

• Support lesson materials from google drive, youtube, etc to bridge the gap if we want serious integration with classroom.
• Support adding a question assignment that asks students their feedback on the lesson they were taught.
• Take these responses and put them on the website as feedback for the lesson.
• Allow the teacher to volunteer student work (that has been uploaded by the student - it would be so seamless) for other teachers to learn from, or embed in their feedback for a lesson plan.
• Give the feedback made by teachers who have used classroom a boost, because we know for sure that they used the lesson on students.