This is for a 100 minute lesson, but there are two tasks which could be split over two 50 min lessons.
The Timeline Poster is one activity and the Darwin text based activity is the second activity.
The text may be too textual for low ability or low reading age students, my low reading age group had an LSA and they were ACE!
This resource is aimed at advanced biology students and includes two differentiated practical schedules for the observation of phototactic behaviour in blowfly larvae (maggotts).
Both schedules include a brief introduction to the nature of taxis behaviour, followed by details of the practical task. A table to collate data is provided, followed by a step-by-step method of using the chi-squared test to assess statistical significance.
The worksheet for higher ability students also contains extra challenge questions on the reason for statistical testing and the rationale for using chi-squared.
Key words: behaviour, blowfly larvae, maggotts, statistics, phototaxis, light, response, chi-squared