Reflection: Vertical Alignment Double It - Section 1: Warm Up

 

I am currently tutoring a 6th grader. She is struggling with math and has for several years. One of the problems is that she does not know any of her number facts with automaticity. She can count on her fingers to figure things out, but she does not see the obvious, such as when things add to 10 or subtract from 10.

Today she needed to add 126 + 64. She had to write the problem down in traditional columns and then solve the problem counting 6 + 4 on her fingers and then 6 + 2. She got the right answer and knew the process, but in 6th grade to still be counting out simple fact that should be automatic takes so much of her time.

If we can get all children in second grade to develop automaticity with number facts, and to recognize such things as tens and doubles, later math will be so much easier for them to tackle.  Students who can recall previous learnings and especially strategies that have worked in the past and can apply this to new learnings will be more successful as math learners. The child mentioned above takes everything as brand new. She never relates what she has learned before to what she is doing now. She has to start over for each problem she solves. Second grade is an important time to develop a basic understanding of how numbers combine and the rules governing numbers.  Two of the best activities for developing fluency to ten in young children are "make ten" using ten frames and subitizing with ten frames.

 

 

  Why Keep At Partners of Ten
  Vertical Alignment: Why Keep At Partners of Ten
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Double It

Unit 2: Adding and Subtracting the Basics
Lesson 8 of 18

Objective: SWBAT use the addition of doubles to perform doubles subtraction and addition and subtraction with doubles plus/minus one.

Big Idea: Common Core standards state that students will be able to add and subtract within 20 using mental strategies. This lesson presents a set of these strategies.

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