1. Click on Go To -> Sharing Options.
2. Ensure you have a "Student View Key" set up under the "View - Students" heading. This can be anything and is only needed to create the links.
3. Ensure all classes are selected under the "View Classes" field.
4. Click the "Download Links" button or "Email Links to Me" buttons in the upper-right corner of the "View-Students" box.
5. Open the document or email and copy those sharing links as needed. The top-most link in the email or document will be for your currently-selected school year.