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Continuing the Conversation. Continuing the Conversation. Cathy Fosnot. Minilessons for Addition and Subtraction. A warm–up mental math string. 92 + 39 99 + 32 139 + 94 134 + 99 199 + 34 129 + 97 . What strategy does this string support? What big ideas underlie this strategy?. - PowerPoint PPT Presentation
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Continuing the Conversation
Continuing the Conversation
Cathy Fosnot
Minilessons for Addition and Subtraction
A warm–up mental math string92 + 3999 + 32139 + 94134 + 99199 + 34129 + 97
What strategy does this string support?
What big ideas underlie this strategy?
Quick Image Billboards (K-1)
Small Group DiscussionsWhat strategies
would you expect to see?
How would you represent them?
The Landscape of Learning
Let’s go to a classroom…
Cdrom, minilesson folder (3rd), first page
video clips 18, 19, and 20
The Landscape of Learning
Back to the classroom…second page
video clips 3, 5, 6#3 (3 on the top, 5 on the bottom)
#5 (2 on the top, 6 on the bottom)
#6 (is there another way the kids could trick me?)
Grade 243 + 1043 + 2043 + 1968 + 2339 + 54
What’s the focus of the string?
A) compensationB) splittingC) jumps of tens and
adjustingD) moving to a
landmark number
Grade 250 + 5049 + 5125 + 2526 + 2532 + 2849 + 53
What’s the focus of the string?
A) compensationB) splittingC) doubles +/-D) moving to a
landmark number
Grade 2-3192-40192-43378-39247 – 29371 - 19
What’s the focus of the string?
A) constant difference
B) splittingC) doubles +/-D) taking jumps of
ten backwards and adjusting
Back to the classroom… sixth page 192-40
video clips 76, 77
Back to the classroom… Seventh page
video clip 79
Grade 2-3192-40192-43378-39247 – 29371 - 19
Here’s the string again.
Would you continue with the 4th problem?
Revising in actionHow would you finish the string?
Michael’s revisions192-40192-43378-39378-40371-19
Grade 2-3
146-12272-14283-275 (clip 83)
Here’s the first part of a string that Michael does on another day.
Revising in actionWhat conversation would you have?
Have fun with minilessons….