Reflection: Flexibility Increasing and Decreasing Quantities by a Percent (Day 1 of 2) - Section 3: Collaborative Activity 2 - Decimal Multipliers


After watching one class follow the lesson in the order as presented I wondered how this lesson would go starting with the decimal multipliers.  Students would definitely find the matching cards more easily but would they make the connections between increasing by a percent and decreasing by a percent?  Would it test the misconception many students have that increasing a value by a percent and then decreasing the new value by the same percent results in the original value?  I ended up not switching the lesson order for the next group, but I think it might be worth considering.  It might be necessary to draw out the percent misconceptions more earnestly though since students would easily be able to match the decimal multiplier with its equivalent percent.

  Starting with Decimals
  Flexibility: Starting with Decimals
Loading resource...

Increasing and Decreasing Quantities by a Percent (Day 1 of 2)

Unit 5: Percent and Proportional Relationships
Lesson 13 of 15

Objective: SWBAT interpret equivalent representations of increases and decreases of quantities

Big Idea: In the formative assessment lesson students grapple with increasing and decreasing quantities as percents, then decimals, then fractions.

  Print Lesson
5 teachers like this lesson
Math, Number Sense and Operations, Percentages, percent increase, percent decrease, map, mathematics assessment project, changing quantities
  70 minutes
Similar Lessons
Adding and Subtracting Integers
Algebra I » Numeracy
Big Idea: Students will conceptualize the addition and subtraction of integers with a number line and counter chips.
Washington, DC
Environment: Urban
Noelani Davis
Balancing Act
7th Grade Science » Energy, Force & Motion
Big Idea: Can objects of different mass be arranged so they balance one another? Is there a mathematical equation that can predict balance?
Hope, IN
Environment: Rural
Deborah Gaff
Volume of Prisms and Pyramids Fluency Practice
7th Grade Math » Geometric Measurement
Big Idea: Practice makes perfect – students will work on fluency of finding volume of prisms and pyramids.
Elon, NC
Environment: Suburban
Heather Stephan
Something went wrong. See details for more info
Nothing to upload