There are some things teachers just can't tell their students, even if they want to.
But some of these things, while perhaps controversial, could end up being a service to young people, if only someone would just tell them.
So we asked teachers everywhere to weigh in on the one thing they'd love to tell their students but can't, and more than 50 teachers shared their insights.
We've (anonymously) included some of the most constructive thoughts here:
"What is important is the life skills you learn while completing the tasks in class.
"You learn how to argue effectively and communicate with different types of people. You learn how to listen to others and respond respectfully. You learn so much that you don't even realize because it seems disguised by homework and essays. But really, you are learning to be independent adults more than you know."
"Please just know that I love teaching and I sincerely want to help you. But I can't help you if you don't put in the effort. I chose this job because I'm passionate and hardworking and I know my s---, and I will help you get to where you need to be. But you need to meet me halfway.
"It's so frustrating because education opens so many doors, and people around the world would kill to have this educational opportunity. Malala was shot in the freaking head for it. And you're just throwing it all away, and that makes me want to tear my hair out."
"All the standardized testing we do is so insignificant to who you will become."
"You are more than what others judge you to be."
"Sometimes I wish I could tell you when your parents are wrong."
"They stress me out too!"
"But I may not like you at this very moment that you're choosing to act out."
"I'm just as nervous as you are at the beginning of school."
"I am here to help you succeed."
"Your elementary years won't have a tremendous impact on your academic, professional, or personal paths. I wish you could just enjoy these years of your lives. Have fun — you're kids!"
"You'll regret not being nicer to people that you had the chance to."
"Not all of you are going to an Ivy League school after you graduate."
"Knowing the answers to a test does not make you smart."
"I know some of the things I have to teach and you have to learn are boring."
"I have to fight my impulse to check Facebook every day."
"I know that you are an individual with your own perspective and problems even though you're only a teen."
"Parents and students often come to school thinking that it is the teacher's job to help you get smart — you are right. I can only help. Actual learning can only happen by the students themselves. "
"It becomes more work for us to do during the weekends and holidays."
"It's all bulls---. Just have fun, always be kind to those around you, and be true to yourself."
"But they help."
"Elementary school is for fun and learning, and you don't need to take it so seriously."
"I hated Shakespeare in high school, too."
"It doesn't just live in a school."
Responses have been edited slightly for clarity.