Here is a great AP Biology resource for Cell Communication. It includes seven assignments including directions and worksheets for two online activities, a group 3D modeling project, two charts that directly address learning objectives in the AP Biology curriculum, a set of notes, a group "sort cards" activity, and a twenty-item test. The items are strategically sequenced for student understanding. Instructions on how to teach this unit with these resources are included. All student work answer keys are included. Topics covered include the evolution of cell communication, the types of cell signaling, signal transduction, protein receptors (G protein receptor, tyrosine kinase receptor, and ion channels), and specific examples of signals and responses across all domains of life. Students enjoy these activities because they include a variety of instructional strategies.