possible related topics† estimation, Pythagorasí theorem, speed calculations
Learners could focus on the different distances between keys if one-finger typing is taking place. They could also explore the situation with two-handed touch-typing.
Learners might also like to investigate how fast people can text when using a mobile phone keypad.
The article at www.bbc.co.uk/news/technology-10925456 may be of interest.
© Colin Foster 2012, www.foster77.co.uk