Matthew spent over 4 hours on the computer today since leaving school at 3.30pm. His school has signed up to use this fantastic website Mathletics. It encourages children to log in out of school hours and do maths challenges. You can see other children's names and where they're from, school etc, and it keeps a tally of your total. You work towards awards, and Matthew just earned a bronze certificate, so when the school log in tomorrow, they can print it off for him. It's amazing!
EDIT: When I say you see the childrens names... Matthew is just listed as Matthew C, so not his whole name. It's pretty safe.