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Module 2 _Analysis of classroom implementations

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Module 2 _Analysis of classroom implementations

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I was inspired by the second example of teaching activity, the research of starch in foods with Lugol.
I've always done this activity, but this time I set it differently. I gave as usual samples of food (flour, sugar, banana, apple, yogurt, potato) to be tested and I made available two unknown solutions: B (Lugol) and A (NaHCO3). The B I colored it in blue A was yellow due to the presence of Lugol.
The question asked was: "What is the indicator for starch? Solution A or B? What will be the signals to detect?"

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Hi!
I teach biology and environmental science. As most of you I use research activity methodology.

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Module 2: Implement inquiry in the classroom

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Module 2: Implement inquiry in the classroom

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We will discover:

how to build your skills and confidence to implement inquiry-based teaching in the classroom

how to analyse different implementations of IBSE in life sciences

several examples of classroom implementations

tips and good practices from successful practitioners

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after 2 hours

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Hypothesis. The concentration of sugar affects the development of yeast cells: low concentrations behave as a substrate while higher concentrations inhibit its development due to the higher osmotic ambient pressure.
Required materials: 7 test tubes, yeast, syrup of sugar, 7 balloons, water.
Method:  prepare the syrup (100g / 150ml of water) and active the yeast in 150 ml of water.
I prepare 7 tubes with 10 ml of water suspension and yeast and increasing quantities of syrup. The total volume is brought to 15 ml.
After 2 hours in the 3 test tubes with the minimum quantity of sugar the gas production was observed. Then the hypothesis made at the beginning has occurred

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Module 1: 1.2. From the situation to the hypothesis 

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Module 1: 1.2. From the situation to the hypothesis 

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Organic jams are more delicate because they contain a lower percentage of sugar.

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Module 1: Experience inquiry as a learner

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Module 1: Experience inquiry as a learner

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Thinking like a student is interesting.
When I watched the first video I realized that it was a fermentation .. but I confess that my response was rushed because I have not reasoned about the role of sugar as a preservative and I thought of adding in the second confiture of an acid-based preservative

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I have always privileged teaching in the laboratory using the research-action methodology

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I have always privileged teaching in the laboratory using the research-action methodology

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I teach Natural Sciences in the "IIS Gramsci Amaldi" of Carbonia

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I teach Natural Sciences in the "IIS Gramsci Amaldi" of Carbonia

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I live in in the southwest of Sardinia, one of the most beautiful places in the world