There are two easy ways you can find books with Interactive Word Study activities.
You can look for the Interactive Word Study Activity icon above any book:
Or you can filter for books with the word study activity under the My Collections section on the left rail:
Once inside a book with the activity, click on the Interactive Word Study Activity icon, then select the activity you want to launch from the pop-out menu.
For a video walkthrough that includes finding the word study activities, please see Make a Big Word Walkthrough Video.