If your Topic Bank has no topics available for selection, make sure teachers are sharing their topics with the Topics Bank. Teachers have to share a topic to the Topic Bank before the topic becomes available to other teachers.

To Share a Topic: 

1. Navigate to the class in which the Topic was added 
2. Select the Topics tab 
3. On the appropriate topic select the "Share" icon
User-added image
4. Select the option for Add to Topic Bank 
User-added image
4. Save