open terminal/gitbash
navigate to repository
cd {{path_to_your_folder_in_class_repo}}
ensure you are on the MASTER branch
git checkout master
update your repository
git fetch upstream
git merge upstream/master
After merging you may enter VIM, the terminal text-editor. If so type :q, then press Enter.
add and commit your new files/folders
git add .
git commit -m '<NAME OF ASSIGNMENTS TO TURN IN>'
git push
Go to website of your repo on github github.com/{{username}}/{{repo name}}
Click the Pull Request button
Add a more specific comment if you feel you need to
Click the green confirmation button
YOU'RE DONE!!! (and techincally you've commited to an open source project!!)