1. Introduction to Standard Deviation Using CTAT to create an Example Tracing Tutor by Abbass Sharif and Julie Taylor Standard Deviation PSLC 6.07

2. Standard Deviation Definition: -a measure of how much the data in a certain collection are scattered around the mean

3. Background Knowledge Target Audience: 7th grade students Students come to Tutor with knowledge of: • Range • Mean • Number line Standard Deviation PSLC 6.07

4. Purpose of Tutor: To • Create a motivating force for students to visually determine standard deviation based on the distance from the mean • Create an interactive learning environment Standard Deviation PSLC 6.07

5. Highlights • Visual display of interface creates a platform which allows students to interact with facial features, for fun and stimulation • Builds on intelligence by encouraging students to use a different means to an end; rather than calculating standard deviation-they use visual properties to determine answer • Provides positive feedback and well as helpful suggestions for improving incorrect answer Standard Deviation PSLC 6.07

6. Standard Deviation PSLC 6.07

7. Future Steps • Integrate animated pedagogical agents to the system to create more interaction, to create a “social connection” with computer: Persona Effect • Expand content to provide multiple examples and opportunities • Expand content to cover more statistical concepts Standard Deviation PSLC 6.07