Need a quick marine-science activity that is easy to access and ready when your lesson plan suddenly changes? This Mystery Doug YouTube video lesson turns the short clip “How Do Jellyfish Sting?” into a focused, no-prep worksheet students can complete before, during, and after viewing. This resource is built for the reality of a busy classroom: a 5-10 minute YouTube clip, a clear student worksheet, a teacher answer key, Google Classroom options, and a 10-question self-graded quiz. It is perfect