This option is only available for classes with a single learning path. It won't be enabled if your class includes 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.