2.NBT.A.1

Understand that the three digits of a three-digit number represent amounts of hundreds, tens, and ones; e.g., 706 equals 7 hundreds, 0 tens, and 6 ones. Understand the following as special cases:

 
12 Lesson(s)
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Each Number Has a Place: Tens and Ones

2nd Grade Math » Unit: Each Number Has a Place
2nd Grade Math » Unit: Each Number Has a Place
Kristen O'Connor
Pepperell, MA
Environment: Rural
 
Big Idea:

The big idea of this lesson is that the base-ten number system uses models to show numbers. The ones digit represents how many ones, and the tens digit represents how many groups of ten.

 
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screen shot 2013 12 21 at 2 22 35 pm
   

Odd or Even

2nd Grade Math » Unit: Each Number Has a Place
2nd Grade Math » Unit: Each Number Has a Place
Kristen O'Connor
Pepperell, MA
Environment: Rural
 
Big Idea:

The big idea of this lesson is for students to be able to determine odd and even numbers and why it would be important to understand odd and even groups.

 
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two great math
   

Finding the Right Place!

2nd Grade Math » Unit: Numbers & Operation in Base Ten Grade 2
2nd Grade Math » Unit: Numbers & Operation in Base Ten Grade 2
Carol Redfield
Jackson, MS
Environment: Urban
 
Big Idea:

Students use numbers, base-ten models, and real-word pictures to examine ways to place numbers in their correct place.

 
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right place
   

What is a Digit

2nd Grade Math » Unit: Sensible Numbers
2nd Grade Math » Unit: Sensible Numbers
Beth McKenna
York, ME
Environment: Suburban
 
Big Idea:

Students extend their understanding of the place value system, in base-ten notation, recognizing that the digits in each place represent amounts of hundreds, tens or ones.

 
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unknown
   

Moving Along In Tens

2nd Grade Math » Unit: Everything In Its Place
2nd Grade Math » Unit: Everything In Its Place
Beth McKenna
York, ME
Environment: Suburban
 
Big Idea:

Grouping by tens reinforces the understanding of place value

 
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Reflections (1)
100 0615
   

Identifying Tens and Ones

2nd Grade Math » Unit: Numbers & Operation in Base Ten Grade 2
2nd Grade Math » Unit: Numbers & Operation in Base Ten Grade 2
Carol Redfield
Jackson, MS
Environment: Urban
 
Big Idea:

Students will be given set amount of money to add, and identify how many tens and ones.

 
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tens chart pic
   

How Big Is One Thousand

2nd Grade Math » Unit: More Complex Numbers and Operations
2nd Grade Math » Unit: More Complex Numbers and Operations
Beth McKenna
York, ME
Environment: Suburban
 
Big Idea:

Students can get a picture of how big 1,000 is as they build and compare 3-digit numbers.

 
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100 1237
   

Put It Together and Take It Apart

2nd Grade Math » Unit: Numbers Have Patterns
2nd Grade Math » Unit: Numbers Have Patterns
Beth McKenna
York, ME
Environment: Suburban
 
Big Idea:

Students increase their understanding of place value by manipulating larger numbers.

 
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100 1236
   

The Purpose of Zero

2nd Grade Math » Unit: Money
2nd Grade Math » Unit: Money
Beth McKenna
York, ME
Environment: Suburban
 
Big Idea:

Zero makes a difference, depending on where it is. It may be worth nothing, but it has a special place in numbers.

 
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images 3
   

Where Can I Find It

2nd Grade Math » Unit: Sensible Numbers
2nd Grade Math » Unit: Sensible Numbers
Beth McKenna
York, ME
Environment: Suburban
 
Big Idea:

The Common Core standard is for students to add and subtract numbers within 100 fluently using models. They must understand the place value to build the models.

 
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100 0547
   

Students as Teachers Part II

2nd Grade Math » Unit: More Complex Numbers and Operations
2nd Grade Math » Unit: More Complex Numbers and Operations
Beth McKenna
York, ME
Environment: Suburban
 
Big Idea:

Students are given the chance to teach about how they solve math problems.

 
Resources (8)
 
Reflections (1)
screen shot 2014 04 24 at 7 56 48 am
   

Counting with Yen

2nd Grade Math » Unit: Place Value
2nd Grade Math » Unit: Place Value
Beth McKenna
York, ME
Environment: Suburban
 
Big Idea:

Japanese yen work on a Base 10 system. Students can review taking larger numbers apart while learning more about the Japanese money system.

 
Resources (10)
 
Reflections (1)
100 1273

100 can be thought of as a bundle of ten tens — called a “hundred.”

The numbers 100, 200, 300, 400, 500, 600, 700, 800, 900 refer to one, two, three, four, five, six, seven, eight, or nine hundreds (and 0 tens and 0 ones).

Common Core Math
 
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