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

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

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

4. Standard Deviation PSLC 6.07
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

5. Standard Deviation PSLC 6.07
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. Standard Deviation PSLC 6.07

7. Standard Deviation PSLC 6.07
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