1. Number Strings © 2014 University of Washington.

2. Our work today… Number Strings –Engaging in the activity as learners –Observing enactments through video –Reflecting on purposes of Number Strings –Closing the Session Exit cards © 2014 University of Washington.

3. Number Strings 70-30 70-31 70-29 70-49 © 2014 University of Washington.

4. Debriefing Number Strings –What was the mathematical goal for that “string” of problems? What content we were working on? –How are the problems related? Why are they sequenced in that way? –How did Megan use representations? What did they afford? –What opportunities for student learning do you see in this instructional activity? © 2014 University of Washington.

5. Observing Number Strings Teaching Channel Video Fourth Grade – Division String © 2014 University of Washington.

6. Debriefing Number Strings –What was the mathematical goal for that “string” of problems? What content we were working on? –How are the problems related? Why are they sequenced in that way? –How did the teacher use representations? What did they afford? –What opportunities for student learning do you see from this video? © 2014 University of Washington.

7. Analyzing Number Strings What is the mathematical goal of each string? What’s the content being worked on? How do you see the problems related? Why are the problems sequenced in this way? What representations might be useful to use? 25 + 25 25 + 26 25 + 24 25 + 28 33 - 4 42 - 37 31 - 7 35 - 28 2 x 24 4 x 24 2 x 48 8 x 12 16 x 6 32 x 3 3.5 x 14 150 ÷ 15 30 ÷ 15 180 ÷ 15 300 ÷ 6 30 ÷ 6 270 ÷ 6 © 2014 University of Washington.