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The technical school where I do some teaching had an open day on Saturday consisting of a series of workshops demonstrating activities from the different courses. So biology was represented by an area where you get all your vital signs measured and find out your fitness age and the auto courses offered to calibrate your speedo so you didn’t get caught speeding inadvertantly. I was given the task of streaming a radio station for the period of the open day and for this purpose I was allocated 24 students to help. Unfortunately