Reflection: Student Ownership Pineapple Enzyme Lab (Day #2 of 3) - Section 3: Instructional Input/Student Activities


With the plan in place from Day #1, today's work entails getting all teams to lab and ensuring that everyone knows their role to play and my support of students all along the spectrum of skill and confidence regarding hands-on investigations. This, I believe, is the hardest sort of task for both student and teacher alike. How can I (teacher) equip students to be independent in the lab? It starts with making a plan and being shown (with grace and understanding) what that plan looks like. Obviously there are myriad opportunities for (small and large scale) failure along the way but the stakes are pretty small should things do awry. 

As you can see in student B's lab report the procedures are pretty specific with each student volunteering to take a portion of them. For yesterday's class, steps #1-7 were accomplished to set up today's work. This student's team investigated the effect of freezing temperatures so they had an extra step (compared with the teams boiling the pineapple) because the freezing process took longer. Now, all teams are essentially synced up and steps #8-12 are the focus for today. 

You will notice that the initial condition of the gelatin has been recorded in the data table (called Day #1 since it was the initial day that any observing and recording would have been completed). Both the experimental and control groups' gelatin was "warm liquid" and "liquid" since it hadn't been refrigerated yet. The question then becomes, will the gelatin harden for either or both conditions as a result of the pineapple being  frozen or boiled?

  Student Ownership: Working together for a shared goal...
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Pineapple Enzyme Lab (Day #2 of 3)

Unit 2: 2) Cells ("Form and Function")
Lesson 18 of 20

Objective: Collect evidence and use it to develop a claim and compose an argument about the effect of temperature on enzyme activity.

Big Idea: Enzymes are protein-based molecules that catalyze (speed up) chemical reactions. Cell chemistry is essentially impossible without sufficient quantities of properly working enzymes.

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2 teachers like this lesson
Science, enzyme-catalyzed reactions, cells, form vs. function, investigation, denature, bromelin, substrate, enzymes, gelatin
  55 minutes
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