To check your grades on your MyUW page:

1. Go to http://myuw.washington.edu.
2. Login with your UW NetID (this is not the same as your CSE NetID in general).
3. At the top of your MyUW page, click "Change Content".
4. On the next page, click "Browse & Choose".
5. On the next page, check the box next to the CSE channel and click "Save".
6. Finally, reload your front page again, and you should see your 303 grades in a new box.