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The Common Core State Standards in Mathematics advocates for developing strategies for solving computational problems mentally.
Number Strings are a set of number related clues that solve a computation problem. Students listen to the clues and arrive at a solution. Then the student shares the answer and justifies how he/she arrived at that answer. In a number string, there can be any of number clues. We would suggest beginning with 2 clues and working up to 5 for primary students and staying with addition and subtraction operations until the students have had some experience with halving and doubling numbers and making easy fair shares.
Using Number String problems is a way to help students develop not only mental computation skills, but also their listening and speaking skills. The added challenge of using numbers used in the real world, helps the student develop the ability to apply real world numbers in their computations. As students share their thinking, they are developing their quantitative and abstract reasoning and communication skills. Sharing and listening to peers helps students evaluate another person's justifications. Writing and creating their own number string problems is offering a very important critical thinking opportunity - well worth the time taken to develop these kinds of problems throughout the school year.
This download includes 30 Number Strings and would also be a great center activity for students to work on solving problems mentally with partners!
In this free download you will find a variety of number strings that can be used in grades K-3. We plan to add a variety of number strings around different topics so be sure to follow our store!
Please be sure to review the product! We think that you and your students will enjoy using number strings to build mental math skills!
Number Strings are a set of number related clues that solve a computation problem. Students listen to the clues and arrive at a solution. Then the student shares the answer and justifies how he/she arrived at that answer. In a number string, there can be any of number clues. We would suggest beginning with 2 clues and working up to 5 for primary students and staying with addition and subtraction operations until the students have had some experience with halving and doubling numbers and making easy fair shares.
Using Number String problems is a way to help students develop not only mental computation skills, but also their listening and speaking skills. The added challenge of using numbers used in the real world, helps the student develop the ability to apply real world numbers in their computations. As students share their thinking, they are developing their quantitative and abstract reasoning and communication skills. Sharing and listening to peers helps students evaluate another person's justifications. Writing and creating their own number string problems is offering a very important critical thinking opportunity - well worth the time taken to develop these kinds of problems throughout the school year.
This download includes 30 Number Strings and would also be a great center activity for students to work on solving problems mentally with partners!
In this free download you will find a variety of number strings that can be used in grades K-3. We plan to add a variety of number strings around different topics so be sure to follow our store!
Please be sure to review the product! We think that you and your students will enjoy using number strings to build mental math skills!
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# of Pages/Slides:
15
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FEEDBACK
mom2fourblessings
Wonderful for a mental math challenge! Thank you!
February 24, 2013 
JISteacher
What a fantastic activity! Thank you so much for sharing this FREE idea.
October 21, 2012
Molly Nowak (TpT Seller)
LOVE it! Great math center idea! Or morning board work... Or calendar math ... Or ... :)
July 20, 2012
Math & Science with TLC (TpT Seller)
:-) Thanks Molly....or, standing in line waiting for lunch....or....
July 23, 2012
janaddington
These will be fun for mental math activity. Thanks!
June 9, 2012
Math & Science with TLC (TpT Seller)
I couldn't agree more! Love the idea of being able to add as many or as few of the clues for students. Great for the common core and mental math!
~Kelli
~Kelli
June 13, 2012
amstalze
Great idea. I am in need of common core ideas
June 4, 2012
Math & Science with TLC (TpT Seller)
Hope you are following! We are adding more ideas everyday! We're busy this summer in PD sessions with teachers, but plan to post some of our new lessons soon!
June 13, 2012
Math & Science with TLC (TpT Seller)
Thanks Teach123! We like how they can also be changed easily just by the number of strings you use, or the numbers you might give!
April 4, 2012
scubateach
I like the idea of being able to give 2-3 strings or adjust to higher levels with more clues. I also like how you added money, geometry, and other concepts to the mental math! Fun product!
January 11, 2012
joansmith
Kids loved them and they are relate to the vocabulary of the CCSSM! Can't wait to see more!
January 6, 2012
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We are teachers on loan from our school districts to The Teaching & Learning Collaborative is a non-profit whose mission is to provide innovative, high-quality professional development and support in mathematics, science, and technology. Staff and consultants are Teachers on Special Assignment, teacher consultants, and retired K-12 educators. Our lessons are written by teachers, for teachers! Funds from sales on TpT go directly back to teachers through high-quality professional development in mathematics and science. Visit us at: Website: http://www.teachinglearningcollaborative.org Facebook: http://www.facebook.com/tlcpage Twitter: @Connect2TLC
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