Some one must attend these children when at play on the school grounds.
Organize the game, mark the boundaries carefully and coach the children
just as in athletics. Have a comrade to attend them when they are
running bases. Call the group together before the game opens; explain
the chief points in the rules. Show what comes of neglecting the
rules—confusion and several other bad things. Prove that just as much
pleasure can be had by following some sort of system as if one goes at
play in a helter-skelter fashion.