New pen ideas

Ok. The sensor's dead. So what's next?

The invigilator writing tool

- A timer is installed on the writing tool, which counts down to the time limit of the exam. The pen locks itself immediately after the time.
- The pen has a display on it, which shows the time
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Optional:
- the pen is bugged with a listening microphone.
- All pens have a locator tool, which means the pen cannot be used to write on any surface other than the test paper.