2.NBT.A.1a

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

 
5 Lesson(s)
   

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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Reflections (1)
screen shot 2013 12 21 at 2 22 35 pm
   

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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Resources (11)
 
Reflections (1)
100 0615
   

Change From $1.00

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

Breaking apart numbers is one way to approach making change and relates to an understanding of how numbers can be manipulated.

 
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Reflections (1)
screen shot 2014 05 13 at 8 15 03 pm
   

Manipulation Central

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:

Not everyone solves a problem in the same way. Reinforcing that different strategies can be used effectively is the goal of this lesson.

 
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Resources (10)
 
Reflections (1)
screen shot 2014 04 23 at 2 33 13 pm
   

Magic of Adding Tens

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

Students should have mastered adding numbers within 10 in first grade. The Common Core stresses adding bundles of tens in second grade.

 
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Resources (12)
 
Reflections (2)
images 1
Common Core Math
 
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