The purpose of the following demos is showing the kind of practicing with Ari 1+2·3 and providing a quick tour through some of the rendering forms used for rendering problems of various types.

Game-based rendering forms:

This rendering form uses a memory/concentration game grid for presenting problems in the form of matching pairs of cards.
Animated Multiple Choice
This rendering form animates the possible answers of a multiple-choice question as stars, balloons, or trucks.
Shooting UFOs
You have to prevent hostile UFOs carrying math problems from landing. You can shoot them by entering the correct result.