Instructor Training Lessons: Assessment & Adaptive Lessons

Here's a port of my [assessment lesson](http://mozillascience.github.io/instructorTraining/designAndAdaptation/index.html) from MSL.

Topics:
 - Reverse Instructional Design
 - Formative & Summative Assessment
 - Peer Instruction

Also, this lesson bakes in activities directly into the lesson plan, per [this blog post](http://mozillascience.org/instructor-hangouts-roundup-oct-16/).

Currently, these activities are [living over at MSL](https://github.com/mozillascience/instructorTraining/tree/gh-pages/designAndAdaptation), but can be copied in here if people like the format; they're set using the [webmaker teaching kit templates](https://webmaker.org/make-your-own). Let me know what people like and we'll update the PR accordingly. For ease of access, see the activity content at:

[Reverse Instructional Design](http://mozillascience.github.io/instructorTraining/designAndAdaptation/RID_01.html)
[Writing Multiple Choice Questions](http://mozillascience.github.io/instructorTraining/designAndAdaptation/assessment_01.html)
[Peer Instruction](http://mozillascience.github.io/instructorTraining/designAndAdaptation/assessment_02.html)

Also todo: copy over the images into an appropriate place.