some things we (myself included) are working on as we go about our school days:

getting the day started right - greeting each other with a smile in the morning

A cheerful heart is good medicine,

but a crushed spirit dries up the bones. Proverbs 17:22

gentle answers to each other
building each other up
laughing together
encouraging each other
working hard and doing our best
remembering good manners
if someone is talking, remember to look them in the eye

this is going to be one of our key verses to memorize and put into practice this year:
Romans 12:10
Be devoted to one another in brotherly love. Honor one another above yourselves.