University instructors are challenged to involve large student populations with varying pre-existing knowledge
in authentic inquiry. We present a model in which students collaborate to design and run their own experiment
and engage in peer evaluation. In the model, students in different lab sections of a multi-section course
explore alternative interconnected hypotheses based around a common theme. A pooled data set from the multiple
sections then forms the basis for discussion during an interactive lecture session. This experience has a significant
impact on student confidence towards participation in science, and establishes a model for enhanced
skill development. To demonstrate the approach, we provide a case study that explores the relationships
between leaf degradation, microbial colonisation and macroinvertebrate feeding in a stream ecosystem.

• A guided inquiry methodology to achieve authentic science in a large undergraduate biology course

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