AI Tutor Knock Adds Red-Ink Correction for Handwritten Math Answers
Hanji Co. has added a red-ink correction feature to its AI tutor Knock. Students photograph handwritten answers and receive visual red-ink markings on the image, identifying errors and providing advice within tens of seconds. The feature supports up to university entrance exam level. It was developed by analyzing hundreds of student answers and consulting teachers to replicate the familiar teacher correction experience.