In this 2-3 week ecology unit students explore biodiversity in the classroom and the field, with the goal of contributing quality observations to the iNaturalist citizen science project and developing scientific questions. Students will learn techniques scientist use to measure and monitor biodiversity by making observations, identifying native plants and animals, and calculating diversity indices. All or some of these lessons can be combined to prepare students for their field observations and exploration of patterns of biodiversity in their environment, and finally communicating their findings from the field. Extension of these activities can lead to longer-term biodiversity enhancement projects defined by the students themselves. The use of field journals is recommended.