Sanibel Sea School will offer an American Red Cross First Aid, CPR, and AED certification course from 9 a.m. to 3 p.m. Friday, March 29. For course details and requirements, visit the American Red Cross website at Cost is $70 per participant. Call (239) 472-8585 for more information and to register. Sanibel Sea School is a 501c3 nonprofit whose mission is to improve the ocean’s future, one person at a time.