I'm crap at it! I either give them a day off in error and find them playing happily by lunchtime or I send them ill!
Now both DD's aged 12 and 9 have a cough and cold...and DD who is 12 is whinging in her room (we're in Oz and it's night here) because I've said that a cold is no reason to have a day off school tomorrow!
She's got no issues with school...happy as ever with her mates and work.
She's snotty and says her head hurts...but she's so dramatic!
How am I meant to KNOW??