Middle schools across America will observe "No Name-Calling Week" starting tomorrow. The program, now in its second year, takes aim at insults of all kinds -- whether they're based on a child's appearance, background or behavior. The initiative has the backing of the Girl Scouts and Amnesty International, but a handful of conservative critics have zeroed in on references to harassment based on sexual orientation. "No Name-Calling Week" was developed by the Gay, Lesbian and Straight Education Network, which seeks to ensure that schools safely accommodate students of all sexual orientations. The group says it's unsure how many schools will participate in this week's event, but says 51-hundred educators from 36 states have registered -- up from four-thousand last year.