From 1953 it's Happy Journey Preparing Your Child for School a handbook for parents whose child will soon enter kindergarten or first grade.
It's a 32 page booklet published by the Department of Elementary School Principals, National School Public Relations Association, and National Congress of Parents and Teachers. I'm not going to scan all 32 pages, but here's a few I think are good.
School is your child's job...
School is a place to try, to practice... to be a pirate
School is a place to practice good health habits... My favorite is "use the bathroom regularly, independently in a sanitary manner." Important words to live by.
This booklet was originally 40¢ back in the day, but I've seen it available online for anywhere from $7 to $22.95. My booklet is in excellent condition so if you're looking for a copy don't hesitate to make an offer.