Remove and restore sea otters, advance time, and watch how sea urchins and kelp respond. Follow the on-screen lesson at your own pace.
Your work: record your predictions, observations, and explanations in a notebook. A six-section classroom journal guide, video directions, and pause points are included if you want a structured report.
Review energy arrows, direct and indirect effects, evidence-based predictions and the limits of the kelp-forest model. Each visual practice question allows one minute.
Your work: explain your choices and record corrections in your journal. These are practice questions, not a formal test.
Follow nitrogen, examine runoff and algae evidence, and work through four rooms at your own pace. A written guide and hints are included.
Your work: record evidence in a notebook and explain how nitrogen and runoff affect the creek. This separate nutrient-cycle investigation complements, but does not require, the kelp-forest activities.