OOO that teacher would be explaining to me, the principal and my child why she didn't have time to give feedback for an incorrect answer so that the child could learn from her mistake. That is a critical factor in assessment. Teach/asses/feedback/reteach.

OH, lookie here, the answer is correct. I think you owe her an apology for not looking at her paper and going over the problem with her.

...reading is pleasure, not just something teachers make you do in school.~B. Cleary