1. SSTI 2012 Linda Luo & Hope Oliver A Sticky Question: How Much Is Too Much?

2. Where ?

4. What questions do you have?

5. Escape to type student responses and +1

6. Group Survey – Gum Entry Poll Directions: 1)Visit to submit your own response Bit.ly/gumentrypoll

8. Prove it! What Info Do You Need? T-P-S Directions: Think (silently) and write a few ideas about what information you would need to justify your survey choice of “yes” or “no.” Be prepared to share out.

10. What Data will be Useful & Convincing? How many spots? Sidewalk Quad

11. Escape to type student responses and +1

12. Most Useful & Convincing Data? How many spots? Count 1, 2, 3….. Area of each sidewalk rectangle? Area of Quad? A = L x W

13. T-P-S: Best Way to Collect Data? Trace… Pick a rectangular space to sample… Count spots… Write 21 Total # spots… Repeat…

14. “HOW-TO” RESOURCES How to measure with a meter stick – centimeters vs. millimeters? Bit.ly/metricruler How to find the area of a rectangle? Bit.ly/rectarea How to convert between small & large metric units? meters (m) centimeters (cm)millimeters (mm) Bit.ly/metricshortcut Seriously??? – metric units? – Why? Bit.ly/metric_rap

15. Data Spreadsheet Directions: 1)Visit Bit.ly/gumdata 2) Submit your response

16. T-P-S: Best Way to Report Data? 2) Calculate area of the sidewalk rectangle with spreadsheet formula 3) Calculate gum density of the sidewalk rectangle with spreadsheet formula Enter in each spreadsheet cell: 1) Total # spots you counted in your sample. 2)Length in centimeters (cm) 3)and width in centimeters (cm) CHALLENGE: Write your own spreadsheet formula for area, show teacher CHALLENGE: Write your own spreadsheet formula for density, show teacher

17. Escape to type student responses and +1

18. T-P-S: Results - What does our data show us? Which is more helpful – spreadsheet tables or graphs? How are results affected by the accuracy and precision of data? Enter Room # L5 and write at least 1 conclusion that you can support by analyzing the data

19. Escape to type student responses and +1

21. Exit Gum Poll Directions: 1)Visit Bit.ly/gumexitpoll 2) Submit your response

22. Sequel – Writing Prompt/Debate Has this evidence convinced you that gum is a problem at our school? Why or why not?

23. Writing Extension What changes in school policy and/or student behavior are called for, based on this evidence?

24. Math Extension The school budget can afford to remove 20, 000 pieces of gum. How much area will be cleaned up?

25. INFO: see next slides Show as needed in response to students

26. Length = 5 m Length = 4 m

27. How much does it cost to remove gum?

28. How Many Gum Spots In a Square?

29. Accuracy vs. Precision Most measure incorrectly Some measure incorrectly Everyone answers incorrectly Everyone answers correctly

30. T-P-S: Best Way to Collect Data? 1) Pick an area on campus. Pick a rectangular space to sample. 2) Lay the plastic sheet in one corner of rectangle. 3) Trace the outline of the plastic sheet. 4) Count gum spots under the plastic. 5) Inside the outline you traced, write the total # of gum spots you counted. 6) Move plastic sheet to a new place inside your sample space. 7) Repeat steps #1-6 until all the spots are counted inside the sample space 8) Measure length & width of the sidewalk rectangle you sampled