Reflection: Intervention and Extension Take Time for Tens: Act One - Section 1: Why?


Why spend a day on addition and place value with only 2-digit numbers?

This is one of those times when taking a day or two to slow down and review possible gaps in understanding will pay off in spades in the long-run.  Students are presumed to enter 3rd grade with a reasonably solid grasp of place value up to 100 but there are many levels of understanding.  This lesson evolved when I realized, in the process of starting a different, complex, multi-skill lesson, that about 1/3 of my students weren’t “with” me.  I stopped, did some task analysis, conferred with a colleague, and came back the next day with this lesson on place value with two digit numbers, which is a 2nd grade skill and fundamental prerequisite to understanding three- and four-digit numbers. 

If it was one day of review for some of the students, that's okay because this is an essential skill. The use of cubes helps build upon students' place value experience in a way that suits the needs of my more concrete thinkers, and also the kinesthetic learners.  I personally think that most young children learn from tactile experiences in a more complete way than they do from abstract experiences-

At the halfway point in the year, when I’ve come to know the children well and we have spent a lot of time learning together, I find 1-1 assessments especially valuable tools for pinpointing specific gaps that flexible and creative children have been able to mask up to this point. Though it has been many years since I was a distance runner, I still sometimes picture learning in those terms.  All fall we have been training and the spring semester of 3rd grade is the marathon.  I’ve built as strong a foundation as I can upon, which to layer the increasingly complex load of 3rd grade skills and concepts.  We can stop if we have to, but not for long, because it’s a challenging but achievable course we have to run if I’m to get them where they need to be for fourth grade.

1-1 assessments like those that I conduct during the independent practice portion of this lesson are, to me, analogous to a visit to the trainer.  The kids are well-prepared and ready to go, but they’ve taken a small tumble because they’ve actually been running with a slight sprain, or a pulled hamstring.  Like the trainer, I diagnose the problem, apply the initial treatment, monitor to make sure that they are applying the treatment, and then we keep on going. 

  1-1 Assessments Can Be Very Powerful Tools
  Intervention and Extension: 1-1 Assessments Can Be Very Powerful Tools
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Take Time for Tens: Act One

Unit 8: Place Value Practice
Lesson 1 of 5

Objective: SWBAT use place blocks and friendly tens to make adding multiple two digit numbers a breeze! They will use precise language to describe their thinking. UPDATED 8/10/15.

Big Idea: Students must have a solid understanding of 2 digit addition w/regrouping before moving on to 3 digit addition!

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10 teachers like this lesson
Math, Place Value, strategy development, addition, subtraction, 3rd Grade
  62 minutes
jose lesson image taking time tens 6792
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