This guide to OpenSciEd unit 7.5: Ecosystem Dynamics and Biodiversity includes: Lesson pacing; and Assessment guidance. School districts that use The Teacher Clarity Playbook by Fisher and Frey Playbook will benefit from using this guide. Each lesson is labeled by a number and letter (ie: 3a) and contains the original resource three-dimensional standards as Lesson Level Performance Expectations. We have broken those PEs into student-friendly Learning Intentions and Success Criteria, which can be posted on boards or digital slides and used for assessment criteria.