Reflection: Developing a Conceptual Understanding Percents in a Box - Section 2: Warm up


This lesson reminded me how important it is to keep the plan flexible. When I saw that my student, Brisa, had come up with a beautiful model for understanding the concept of percent that was much better than any way I could explain it I tossed my own explanation and devoted more time to having students make sense of her model (which I will keep in my plans for next time). The beauty of her model is that it relates percent to proportion perfectly! She clearly demonstrates that 25% is one fourth of the total 100% and that by dividing any total into 4 equal parts, one of those fourths will be the same proportion, or 25%. Teachers sometimes miss these opportunities when students don't feel their ideas are worth sharing or their input is valued. These norms must be constantly nurtured by asking for and praising student ideas. I have no idea how many great ideas I mistook for random doodles! The extra time it takes to ask them to explain what they have done is often well worth it!

  Developing a Conceptual Understanding: Using a students model
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Percents in a Box

Unit 8: Exploring Rational Numbers
Lesson 8 of 20

Objective: SWBAT convert decimal numbers to percents and find the percent of a number using a box diagram.

Big Idea: The percent proportion can be modeled visually.

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Math, Place Value, Number Sense and Operations, Differentiation, prior knowledge, white boards, box diagram, decimal to fraction, minimum day schedule, rational numbers
  35 minutes
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