Oho! Good, until the high-schoolers learn, often the hard way, that taking their phone out in a dinghy is not like in a carWhich makes me realize everyone with an iPhone has that "utility" app that has a GPS-based compass, that most have never used. I do use it.
Best wishes for your courses. So satisfying when a student suddenly 'gets it,' and advance from where they were towards where you know they want to be.
(and for nervous newbie instructors: who also learn like a doctor to run all plans through the 'do no harm' mantra)