Reflection: Standards Alignment Mystery Powders Day 3 - Section 2: Iodine Test


Sometimes investigations can go awry and not be perfectly accurate. The testing sheet proved to be somewhat of a "leaker" and powders were easily contaminated. It is important that students adhere to just a couple of drops of liquid. I was carefully monitoring it, but alas, there were still some goofy results on some of the sheets due to cross contamination. At this point I decided whether I should be addressing cross contamination or not. I decided it was important to focus on the first goal of the lesson of using precise language and accurately recording observations of an investigation. Because there are no 4th Grade NGSS standards that address chemical reactions, I needed to remember that the practice standard was the forefront of my purpose. That standard meant that this investigation was purely to design and conduct an investigation, ask questions and participate in discussions.

  Standards Alignment: Focus on the Skill of Learning to Accurately Observe
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Mystery Powders Day 3

Unit 1: Thinking, Writing, and Observing Like a Scientist
Lesson 7 of 10

Objective: SWBAT determine the contents of the mystery powder using their observations and testing chart.

Big Idea: Students test the "Mystery Powder" by dropping various liquids and then determine what's in it using their data and comparison skills.

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23 teachers like this lesson
Science, drawing conclusions, Analyze and Interpret Data, collaborative discussion, observations
  50 minutes
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