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      Day: October 1, 2019

      Item of the Week, Teacher Resources

      Item of the Week

      Item of the Week

      This week’s Item of the Week is the Becker Bottles “One in a Million.”  This teaching tool helps students visualize what 100,000, 10,000, 1,000, 100, 10, and 1 parts per million (ppm) looks like. Yellow and red beads, which illustrate 100,000 and 10,000 ppm are easy to find, whereas white, pink, green, and black beads,…

      October 1, 2019 by STEM Center
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