number talks
Post on 30-Dec-2015
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Number Talks
Developing Mental Strategies for Dealing with Numbers
Adapted from St. Vrain School District
About Number Talks
• Students participate daily• In addition to 1 hour math session• 10 - 15 minutes• Number talks replace
– timed tests– drilling facts– around the world games
• Students do not use pencil and paper
Facilitating Number Talks
• Record all processes so students can ask questions about strategies they find confusing
• Encourage students to try a “new” strategy regularly
• Question students to help them clarify their strategies
• Ask repeatedly, “Who thought of it differently?”
Elements of a Successful Number Talk
• All children are participating• Thumbs up when ready• Safe Environment:
– No criticism or praise
• Quiet thinking time• Collect all answers• Share Three Strategies
Successful Number TalksContinued
• Record the strategies• Use careful questioning to draw
explanations• Not too much help: Let them struggle!• Don’t leave incorrect explanations• Encourage children to try other
strategies• Name strategies
What Students Might Do
• Use landmark numbers58 + 27
58 - 8 = 5027 - 2 = 2550 + 25 = 758 + 2 = 1075 + 10 = 85
What Students Might Do
• Front end addition24 + 86
20 + 80 = 1004 + 6 = 10100 + 10 = 110
What Students Might Do
• Take apart numbers100 - 55 - 12
100 - 50 = 5050 - 5 = 45 45 - 10 = 35 35 - 2 = 33
What Students Might Do
• Change order in addition5 + 42 + 20 + 25
20 + 5 = 2525 + 25 = 5050 + 40 = 9090 + 2 = 92
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