I got a promethean activboard 300 pro back in September and when I got it the board had no pen so I ordered a pen and when I got it I tried calibrating the board but it would not sense the pen but when it's not on the calibration screen the board senses the pen but its way off. The pen I got is light grey and I don't know if I got a student pen. I ordered a teacher pen and I haven't gotten it yet. I wanted to know if you had to have a teacher pen to calibrate the board?
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