Their solution: Fight explicit teen dancing with an equal dose of explicitness. Downey and Aliso Niguel are among the first schools to draft "dance contracts," binding agreements that parents and students must sign before a teenager can step onto the dance floor. Administrators say the graphic descriptions in the contracts leave little room for arguments over interpretation and put everyone on notice about appropriate behavior. The Downey contract, for example, specifies "no touching breasts, buttocks or genitals. No straddling each others' legs. Both feet on the floor." Students get two warnings about sexually suggestive behavior before being booted without a...