Subtracting Decimals

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Objective

The students will be able to subtract numbers with decimals.

Big Idea

Get to the Point!

Overview

Activities

150 minutes
  • Introduce Skill
    • While preparing myself for teaching/introducing today’s skill I view a short tutorial from Khan Academy.
    • I bring the students to area of the room where I can use the whiteboard and they can gather with their whiteboards.
    • I introduce their ‘I Can’ statement for today.
      • I can subtract numbers that include decimals.
    • As a group we go over the skill and practice it on our whiteboards.

 

 

 

  • Check-In
    • The students and I review the worksheet from the previous activity.
      • I go over the first few problems with the students.
      • Then one at a time I have students take turns explaining the remainder of the problems. 

 

Assessment

30 minutes

Generally the purpose of classroom computation isn’t quantity, it is quality with a focus on explaining the strategies used and how/why it is true. However, the purpose of targeted skills practice includes fluency, as well as additional review to build comprehension.  I am looking for the student to demonstrate their fluency on this skill by completing the assessment with very few errors and within a reasonable amount of time.  The assessment is meant to be completed in no more than 30 minutes.