reaction time and state of matter (#420)

* STEM0

* stem1

* STEM_soil

* soil_2

* update to stem lesson

* acceleration update

* reaction time

* update reaction and states of matter

* remove make pages

* stem index page

* update to stem lessons

* stem page update

* moving docs to projects

* update make

* editing

* code2

* complete reaction time project

* states of matter

* finish draft states of matter

* finish draft of states of matter

* make update for reaction game

* update make pics for projects

* index page

* reaction time landing page

* states of matter landing page

* make reaction time

* make reaction time1

* reaction time make2

* reaction time code

* reaction time code2

* forms of matter make3

* states of matter  make

* delete stem course folder

* deleting unecessary images

* delete add'l images for lessons

docs/projects/reaction-time.md

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+
+# Reaction Time
+
+### @description A reaction time experiment made of cardboard
+
+### ~avatar avatar
+
+Make a reaction time experiment that responds to your body's conductivity!
+
+### ~
+
+https://youtu.be/DgJ-S0q0EMs
+
+## Duration
+
+2 Activities, approx 30-45 min each based on familiarity with the coding concepts
+
+## Materials
+
+* Cardboard 
+* Aluminum Foil
+* Permanent Markers (Red and Black)
+* 1 @boardname@, battery holder and 2 AAA batteries
+* 4 Crocodile clips
+
+## Activities
+
+* [Make](/projects/reaction-time/make)  
+* [Code](/projects/reaction-time/code)  
+
+### ~button /projects/reaction-time/make
+
+Let's get started!
+
+### ~