Lesson 4
Part 2

Water, Water Everywhere: Designing Water Filters

Designing a Water Filter (2) / Grade 5 / Jersey City, NJ

EiE - Water, Water Everywhere: Designing Water Filters L4P2

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The EIE Curriculum

Students focus on the environmental engineering problem of providing clean water as they imagine, plan, create, test, and improve their own water filters.

Reflection Questions

Working with water and other “spillable” materials can quickly become messy. What preparations do you notice Marlene has made in order to efficiently manage materials?

Marlene organizes water filter materials, pre-pours water samples, and coordinates the testing of filters.

  • Marlene has used easy-carry plastic tubs to hold all the water filter materials for each group. This allows for easy transport through a crowded classroom. (0:35)
  • Marlene pre-measured and poured a 1-cup sample of dirty water for each group to use in their filter test. (1:51)
  • Marlene has all the students use the same procedure and test their filters at the same time so that water is only being poured at specific, limited times. (2:29)

What do you notice about the way Marlene has students score their filters in terms of color? How does this evaluation differ from what is presented in the guide?

Because Marlene had limited time, she modified the color scoring rubric for her students.

  • She reduces the number of points on the scoring scale from 5 to 4. (3:29)
  • Instead of using the sample color dilution formula cups recommended in the guide, she holds up student result cups to illustrate the different colors. (3:47)
  • The guide suggests using the dilutions in order to provide a more scientifically accurate measure of color. Because Marlene wanted her students to have more time to focus on the optional variable of cost, she chose to spend less time analyzing the color results.