What to expect -- From snorkeling to scuba diving -- Snorkelers versus scuba divers -- The journey from snorkeling to scuba diving -- The structure of observed learning outcomes (SOLO taxonomy) -- Unpacking the standards -- Depth of learning -- Building background knowledge or activating prior knowledge? how do you know? -- Diving environments: models of instruction -- The essential role of the teacher, the view from the boat -- Types of engagement -- Evidence-based strategies -- Literacy through science -- Overt versus covert engagement -- Performance versus learning -- The eight main ideas -- The snorkeling and scuba diving classroom -- Making your own journey from a snorkeler to scuba diver.