Series Math Routines with Kristin Gray: First Grade : Which One Doesn’t Belong: First Grade
Math.1.NBT.B.2a
| Common core State Standards
- Math: Math
- 1: Grade 1
- NBT: Number & Operations in Base Ten
- B: Understand place value
-
2a:
Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases:
a. 10 can be thought of as a bundle of ten ones -- called a \"ten.\"
b. The numbers from 11 to 19 are composed of a ten and one, two, three, four, five, six, seven, eight, or nine ones.
c. The numbers 10, 20, 30, 40, 50, 60, 70, 80, 90 refer to one, two, three, four, five, six, seven, eight, or nine tens (and 0 ones).
Math.1.NBT.B.2b
Common core State Standards
- Math: Math
- 1: Grade 1
- NBT: Number & Operations in Base Ten
- B: Understand place value
-
2b:
Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases:
a. 10 can be thought of as a bundle of ten ones -- called a \"ten.\"
b. The numbers from 11 to 19 are composed of a ten and one, two, three, four, five, six, seven, eight, or nine ones.
c. The numbers 10, 20, 30, 40, 50, 60, 70, 80, 90 refer to one, two, three, four, five, six, seven, eight, or nine tens (and 0 ones).
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A "Which One Doesn't Belong" routine encourages students to reason about the similarities and differences among a set of numbers, expressions, shapes, or images.
Discussion and Supporting Materials
School Details
Shields (Richard A.) Elementary School910 Shields Avenue
Lewes DE 19958
Population: 560
Data Provided By:
Teachers
Kristin Gray
Math / Kindergarten 1 2 3 4 5 / Teacher
Newest
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4 MIN
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5 MIN
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5 MIN
UNCUT CLASSROOMS
| TCHERS' VOICE
English Language Arts
2 Comments
Brianna Dusek May 16, 2020 7:34pm
I love the teacher's ability to give every student the ability to explain their thought process. There is such freedom for them to wrestle through their thoughts and how they arrived at their conclusions. They then work together as a class to work through the answers.
Janis Maltos Jul 2, 2018 2:12am