If you want to use the Quiz Mode of an activity, set the Quiz Mode switch to . When this mode is on, you won't see feedback during the activity, but you'll get a score and see the answers at the end. To use the regular version of the activity, leave the switch set to .
In the main part of the screen, {{#web}}click{{/web}}{{^web}}tap{{/web}} the Practice button for the activity you want to use. (You can {{#web}}click{{/web}}{{^web}}tap{{/web}} on the image of any activity if you want to see a larger image of it before you choose it.)
On the next screen that appears, choose the content you want to use with the activity. Consult Choose Content for Activities for details.