A set of 6 lessons covering all the learning objectives from OCR A level BIology Module 3- Exchange surfaces.

It covers the properties of exchange surfaces, mammalian respiratory systems and ventilation o those systems as well as both insect and fish respiratory systems.

All lessons are full lessons with starters, full notes, various student activities and a differentiated summary activity at the end.

Includes links to videos for both fish and insect dissections with accompanying questions if practicals are not possible due to covid secure conditions.

Al answers are included.

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