What can one clear ring tell us? This two-lesson sequence follows a class from setting up an antimicrobial disc test to measuring the evidence and predicting how a bacterial population grows. The topic roadmap helps you schedule the return visit for the plate readings.

Lessons included

1. ����Vlogting antimicrobials on agar. Plan and carry out a controlled disc comparison using a school-approved teaching culture.
2. Measuring inhibition zones and bacterial growth. Estimate zone and colony areas, then model a population through repeated doubling.

The paid ZIP contains both editable PowerPoints, both 50-minute lesson plans and practical sheets, pupil recording and practice activities, the editable 12-question school circle worksheet, worked teacher keys, technician notes and a topic roadmap.

Covers AQA GCSE separate Biology 8461 section 4.1.1.6 and required practical 2. The first lesson also supports the Edexcel Biology 1BI0 antimicrobial core practical. Ages 14–16. The two individual lessons cost £2 together. This pack costs £1.