Lab activities in primary and secondary education are essential to promote students' scientific skills. In this article, we propose a lab activity where different antimicrobial agents are used to the microorganisms' susceptibility to them. Moreover, we produce a rubric, a scoring tool, to quantify students' replies and evaluate the whole activity. We concluded that using the scoring rubric, we have been able to evaluate students' replies and students' benefit.
Keywords: biology; disk diffusion test; lab activity; rubric; secondary education.
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