Spell Checking

assignments/button.md

@@ -32,7 +32,7 @@ You should make a case for why this is an assistive technology of some sort. For
 
 There is some great software that con be connected to the Arduino including [1Shield](https://1sheeld.com/), [AppInventor](https://appinventor.mit.edu/), [Blynk](https://blynk.io/) and [IFTTT](https://learn.adafruit.com/heybrows/ifttt). Some work only for Android, others for both Android and iPhone.
 
-There are lots of really great examples online of arduino based projects, arduino projects that involve smartphones, and arduino projects that involve 3D printing or laser cutting. Many of them are too complex for the expectations of this project, though they might help to inspire final projects, or give you ideas for something simple you can do in a week. Here is a sample:
+There are lots of really great examples online of Arduino based projects, Arduino projects that involve smartphones, and Arduino projects that involve 3D printing or laser cutting. Many of them are too complex for the expectations of this project, though they might help to inspire final projects, or give you ideas for something simple you can do in a week. Here is a sample:
 
 Thingiverse items [tagged with Arduino](https://www.thingiverse.com/tag:arduino/). Some examples:
 - [A custom keypad](https://www.thingiverse.com/thing:3810124)
@@ -60,5 +60,5 @@ Create a Thingiverse or Instructables page for your project with a brief descrip
 | 1 or 0 | Project includes a working circuit that you designed              |
 | 1 or 0 | Project includes at least one button                              |
 | 1 or 0 | Project includes some kind of response to the button              |
-| 1 or 0 | Thingiverse or Instructables page describes project in a reproducable fashion.|
+| 1 or 0 | Thingiverse or Instructables page describes project in a reproducible fashion.|