1. I don't want parents seeing past assignments and unofficial transcripts.
2. How can I restrict parents from viewing grades and transcripts?
You need to un-check these particular settings from within the School Settings tab as an administrator.
1. Click on the Settings tab.
2. Click on the Parent/Student tab.
3. Make sure that the "Assignment grades from past terms" and "Unofficial transcript" boxes are unchecked as shown in the example above.
4. Click Save Changes.