Arnan (Roger) Sipitakiat Chiang Mai University, Thailand

1. Using Computational Thinkingas Means for Human Comprehension Arnan (Roger) Sipitakiat Chiang Mai University, Thailand OLPC Regional Workshop July 28, 2008

2. An Example of Computation in Learning

3. http://www.e-cpe.org/olpc/chaba.jpg

4. T x Method I: Calculus

5. Method II: Computational

6. Human Comprehension Earth

7. 2 . Pi . (r1-r2)

9. Balance Control

10. Children experiencing and thinking about balance control situations.

11. Simple IF-THEN Rules If angle < 0 [ setpower 8] If angle > 0 [ setpower -8]

13. Students’ Observations Car was moving too slowly Car was too “bouncy”

14. IF-THEN Rules with Gradient If angle > 10 and angle < 15 [ setpower 6] If angle > 5 and angle < 10 [ setpower 4] If angle > 0 and angle < 5 [ setpower 2] If angle > -15 and angle < -10 [ setpower -6] If angle > -10 and angle < -5 [ setpower -4] If angle > -5 and angle < 0 [ setpower -2]

15. Introducing the idea of Anticipation

16. Observing Body Motion Does this ever happen? ?

17. Observing Body Motion • Observing live actions • Reviewing recorded videos • Reviewing recorded sensor data

19. Pendulum’s Angle (Yellow) Car Speed (Red) 0

20. When giving a solution is insufficient Need time and space to negotiate meaning themselves

21. Top Tip Regulation

22. Descriptions on Paper

23. Balance Beam

24. Spiral Helix Ring

25. On-orbit Reaction Control System (RCS)

26. Phase-Plane Controller

27. Comparison

28. Conclusions

32. THANK YOU