Any remember this cartoon?

Question

A young boy imagines different scenarios of himself ( in Walter Mitty fashion) while he is in school. At one point he is sent to the principal's office and he tells the teacher- "I shall return."

Answer 1

The cartoon I think you are referring to is called "Boyhood Daze" and the characters name was "Ralph Phillips"

Here is the description I found:

Ralph gets sent to his room for breaking a window. There, he daydreams that he's a parent-saving jungle explorer, an alien-fighting jet ace and a convict. His fantasies include such lines as "My insurance will pay for the window and use whatever is left over to buy yourself a catcher's mitt" and "You are being pursued by Martians who all got A's in arithmetic."

Answer 2

I remember it being a Warner Bros. cartoon but I do not recall the title.

Answer 3

I think it was called "A to ZZZZZZZZZZZZ....". Because he was sleeping while he was daydreaming.