This document outlines the key concepts, skills, and assessments for a Natural Science unit on how living beings interact with and reproduce in ecosystems. The unit will examine sexual and asexual reproduction in animals and plants, and how interaction and reproduction impact an organism's role. Students will develop communication, collaboration, organization, reflection, and critical thinking skills. Assessments include an exam on interaction and reproduction, a lab assignment on the scientific method and graphing, and activities applying knowledge to vital functions. The unit aims to develop characteristics of the IB learner profile such as being inquisitive, knowledgeable, and reflective.