Adding additional products to a class is always possible from the class Overview screen.
Begin Editing the Class:
Select the Edit button in order to begin the process of adding a product to the class.
Choose to Add Product:
Select the Add Product button to view the list of available products.
Check the box(es) for the products that need to be assigned.
Select OK to move on to the next step of assigning content.
ASSIGN TEXTBOOK CONTENT
Select the Edit button to view the available textbook resources.
Check the boxes for the textbook resources to assign to the class and select the Save button.
ASSIGN MATHIA CONTENT
Navigate to the Table of Contents tab and select the Edit button to view the available MATHia modules.