Circle of Control I think it is crucial to teach children at a young age that they cannot stress about things out of their control. I know personally, it took me a very long time to grasp this concept because I was never taught as a young student. This will help with mental health issues in that students will learn how to manage their anxieties.
“Your time is limited, so don't waste it living someone else's life. Don't be trapped by dogma - which is living with the results of other people's thinking. Don't let the noise of other's opinions drown out your own inner voice. And most important, have the courage to follow your heart and intuition. They somehow already know what you truly want to become. Everything else is secondary.” ― Steve Jobs