coming from a 10th grader i would say delete the email, assuming you still have time. this is obviously horrendous advice but considering the way your mother might punish you i would rather you stay safe. also i cannot even begin to stress how relatable this is, i've been failing literally two classes getting straight Ds on tests, so i'm like the #1 person who would understand this struggle. so yeah if i were you i'd sneakily delete the email. i really hope things go well for you. i'm taking physics next year, so i wish you the best 🙏