One of my big pet peeves...teachers who can't SPELL and refuse to use a dictionary.
I don't know how many posts or newsletters that I get with a large number of spelling errors in them...and they are from teachers. Makes me wonder if they are teaching children to spell properly! But really, isn't there a phrase about putting your best foot forward?!
Biggest offenders lately, spelling clothes without the e, or wasps but spelled waps, and don't get me started with the their, they're and there issue!
And of all the professions too.