Reflection: Developing a Conceptual Understanding Finding the Hidden Addend - Section 4: Wrap Up


The counting on strategy is difficult for some first grade students (at this point in the year).  Encourage students to share and try out the strategy but realize that not all of the students will truly understand this concept in a meaningful way. When students shift from counting all to counting on, they must think about ideas such as: Where do I start counting? Where do I stop?  What's my answer?  Students are expected to model their thinking with mathematics (CCSS.Math.Practice.MP4).  The students are sharing their use of the counting on strategy as they model for the group.

  Reflection On Counting On
  Developing a Conceptual Understanding: Reflection On Counting On
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Finding the Hidden Addend

Unit 2: Working with Numbers, Operations, and Story Problems
Lesson 2 of 11

Objective: SWBAT solve a problem in which the total and one part are known. SWBAT represent their "action" with an equation.

Big Idea: CSI First Grade! Today your young investigators will try to find the missing addend while playing two different missing addend games.

  Print Lesson
Math, Number Sense and Operations, Operations , 1st Grade, Counting on, missing addend, word problems
  70 minutes
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