What grades determine:

• Your ability to memorize mostly useless things
• Your ability to regurgitate information in the way others want you to
• Your ability to understand what adults want from you and give it to them
• Your tolerance for working on tasks you don't find useful because others want you to do them or believe them to be helpful/socially acceptable

What grades do NOT determine:

• Your intelligence
• Your creativity
• Your emotional capabilities
• Your likeliness to succeed
• Whether you're a good person