Reflection: Unit Planning It's Great to Make 8! - Section 2: Guided Practice


I brought the circles and the old Decomposing 4 page out to link the work that we’ve done in the past with what we will be accomplishing today.  As the numbers get bigger, the challenge and potential complications increase as well. 

I even show one circle as compared to the smaller cubes, so students can see that our activity is similar to what we’ve done—tapping into prior learning—but demonstrating the need for smaller counters.  (I sure wish we could just “flip over” our cubes to a different color on a second side, but we use a second color instead, out of necessity.  I share this with the kids.  One of my turkeys suggests I invent cubes with 2 colors.  Nice idea!)

Decomposing numbers definitely gets more involved and honestly, daunting, as the numbers get larger.  Taking little moments to tie in to earlier activities builds familiarity and confidence, so that all learners are ready to tackle the new challenge.

  Why show the old circles?
  Unit Planning: Why show the old circles?
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It's Great to Make 8!

Unit 10: Decomposing Numbers
Lesson 2 of 12

Objective: SWBAT use linking cubes and a recording sheet to show all the number combinations to make a sum of 8.

Big Idea: Decomposing big numbers is a complicated process. This systematic activity focuses on the the process and makes decomposing large numbers accessible for all.

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Math, Number Sets, whole numbers
  43 minutes
eight monster
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