Student info or a list of students that are in a specific tier can be exported from the Students page:
Using the available filters, you can drill down to see a specific subset of students. For example, in order to export a list of students that are tier 3 in Math, adjust the Topic filter to include Math, and check off the Tier 3 option under the tiers filter:
After applying the filters, the resulting Students page will only include students satisfying those filters. From there, you can click on specific student names, or choose Select All:
From the Actions menu, select "Export Student Data". This will download a CSV file that users can then use for further reporting.
Example of Export: