About this tool

Error Correction Board puts a sentence on screen with a mistake hidden somewhere inside it — a wrong tense, a missing article, a subject-verb mismatch — and challenges the class to find it before you confirm. It bridges grammar instruction and actual editing skill, since spotting an error in someone else's sentence uses a different muscle than avoiding one in your own writing. Put a sentence up, give the class thirty seconds to hunt, then take hands and talk through why the fix works. It's an easy way to close a lesson with something more active than a review handout.