This option is only available for classes with a single learning path. It will not be enabled if your class has more than one of the following:
- Practice Extra
- Digital Workbook
- Unit Progress Test
- Mid-course progress tests
- End of course progress tests
- Competency tests
- Test and train
- Extension
For example, in this class with Prepare Level 1, the button is enabled as it only has access to Practice Extra.
However, in this class with 3 learning paths, Tests, Digital Workbook, and Extension, the button is not enabled.
Tip: For classes with more than one Learning Material (e.g. Empower and Interchange), filtering is only possible by material.