Crossword puzzle clue "good thing to learn"

Good thing to learn

Shakespeare character who says "Good night, ladies; good night, sweet ladies; good night, good night"

Like the first thing you learn

First thing zoo employees learn at the reptile house?

Nat King Cole song with the lyric "The greatest thing you'll ever learn is just to love and be loved in return"

She may learn a thing or two

Place to learn good manners

Good things for kids to learn