The mistakes a child makes in F1 tell the Kumon Instructor exactly where their reading comprehension is breaking down. If you "correct" the answers using a book, you blind the Instructor to problems like dyslexia, attention issues, or a lack of inference skills.
Join a Kumon support group on Facebook. Do not ask for the answer book PDF (you will be banned). Instead, post a photo of the one question your child is struggling with. Other parents who have the answer book can explain why the answer is correct without giving away all the solutions.
Used for "partial" errors like spelling, punctuation, or grammar mistakes. "X" or Slash: Used for completely incorrect answers. Percentage Tracking: