Blackboard chore is a job that involves erasing, which is a seven-letter word. It is a task that is often assigned to students in a classroom setting. The job requires the student to use an eraser to remove any markings from a blackboard or chalkboard. This is done to ensure that the board is clean and ready for the next lesson. Erasing is an important part of the classroom experience, as it allows teachers to start fresh with each new lesson.