by Donggil Song, 2011.

Teachable Agent is an application based on the instructional technology that draws on the social metaphor of teaching a computer agent to help students learn. We wanted to apply the concept of Teachable Agent to the math education field.

**1. Start Eins** (no longer available)

**2. Sign-in**

**3. Teaching Phase**

**4. Draggable Materials**

You can drag & drop these icons to explain the meaning of the arithmetic mean. When these icons are moved to some of vacant rectangles, the program notices what this is.

**5. Interaction**

Currently, it’s simple, only echoing. Later, it will be upgraded to process a natural language.

**6. The number of digits – Drag**

The number of digits will be expressed on the board automatically. Users can also drag and drop this number.

**7. The number of digits – Infinity and “m”**

If “⋯” icon was clicked, the number of digits would become ∞. If “⋯” and “n” were used, the number of digits would become “m”. If you click the “Let’s call it a day” button, the test page will be shown.

**8. Test Phase**

**9. Questions**

After clicking the question buttons (1 to 4) sequentially, you will be able to see your agent’s test results.

**10. Result – Grade D**

**11. Result – Grade C**

If a tutor (user) explained (3+6+8)/3 as a meaning of the mean, Eins would solve the problems which deal with two or three digits only.

**12. Result – Grade A pattern**

**13. Result – Another Grade A**