Update turn-in-checklist.md

Update submission requirements to reflect current schedule and the switch to RStudio Cloud

materials/turn-in-checklist.md

@@ -7,9 +7,8 @@ title: Assignment Submission & Checklist
 
 - What files to submit: 
     - **Week 1** - one text form, one .xlsx file
-    - **Weeks 2-9** - a zip file containing one .R file, one .Rproj file, & any data files needed to run it
-    - **Week 10** - a link to a GitHub repository
-    - **Weeks 11-13** - either a zip file containing one .R file & any data files needed to run it or a link to a GitHub repository containing the .R file and any data files needed to run it
+    - **Weeks 2-13** - a link to your RStudio Cloud project
+    - **Week 14** - a link to a GitHub repository
 
 
 # Code Checklist
@@ -20,7 +19,7 @@ title: Assignment Submission & Checklist
   your answers should match those provided. For example, if there are three
   separate plots your code should produce three separate plots.
 - Some errors can lead to only subtle differences so check carefully
-- Sometimes small differences result in changes in packages. If you see a
+- Sometimes small differences result from changes in packages. If you see a
   difference but you think your answer is right, let us know and we can check.
 
 #### Make sure your code follows the instructions