You shouldn't get mad at your family.
John's son comes home from school and tells him that he's gotten a bad grade on a test.
John wants to react to the bad news.
John tells his son that these things happen and that he'll help him study those topics, so he can grasp them better.
John tells his son that is unnacpetable, and he did not raise a moron and that he's grounded for two weeks.
John's son feels supported and is really glad someone will help him unravel the mystery of what he's trying to learn.
John's son is devastated that his dad is angry with him and feels scared about being grounded.