A reading Sprint is where you come to read with other people with a time limit. You both agree on a time and length to start reading and you see how many pages you can read in that time limit.
Eg. :15 for 30 means you start at 15 mins past the hour and you read for 30 mins.
Eg. :15 for 30 means you start at 15 mins past the hour and you read for 30 mins.