1. TASKS FOR THE MATHEMATICAL PROBLEM SOLVING ON THE SITUATIONS OF THE TSUNAMI (for senior high school students) Tran Vui Hue University of Education, Vietnam APEC-Tsukuba International Conference VI Innovation of Mathematics Education through Lesson Study Challenges to Emerency Preparedness for Mathematics 14-18 February 2012 Tsukuba & Tokyo, Japan

2. Some mathematics that can be used to understand a tsunami. Learning mathematics in a real life context. How can we bring real life situations into class to teach mathematics.

3. Historical Tsunami in Vietnam -1904: Thua Thien - Hue -1930: Nam Dinh -1964: Da Nang - Other tsunami in Vietnam were not recorded.

4. Probability of Tsunami in Vietnam is potential

5. People and Natural Disasters in Vietnam

6. From Disturbance to Coastal Flooding because of Overlapping primary sine waves

7. Deep Water Wave

8. Sine Wave

9. Wave propagation and dispersion a tsunami has: Amplitude: h = 1 m Wave Length: L = 300 km = 300,000 m. Max slope: M = 1/50,000 = 0.00002 tiny & invisible.

10. Knowledge Prerequisites Grade 11: 1 st Semester, Vietnamese Curriculum. Calculus: - Derivative to find Slope at a point of a function. - Graph of a trigometry function. - Addition of two functions.

11. Task 1. The bichromatic wave group of a tsunami

13. The wave box with a dynamic presentation

15. It is explored that the surface of a tsunami has roughly the shape of a sine wave at a given instant. In a sine of length L the surface elevation is given by the function: where x is distance along the wave. Task 2. The maximum slope of a long tsunami wave

18. Task 3. Speed of a long tsunami wave

19. Estimating the Affect of a Tsunami to Coastal area in Vietnam if the epicenter is in Manila