Image To the Editor: To humanely redress the racial imbalance of admissions to New York City’s elite high schools, the children who want to take the test need to be rigorously prepared. That preparation should entail the city’s providing after-school and weekend training for motivated children. Unprepared children who are accepted for admission to the schools will suffer emotionally and academically if they are unable to keep up with the demanding requirements. That means these children need to learn how to spend hours organizing, reading, analyzing and thinking. Not preparing them, and their having to do remedial work once at these schools, would be overwhelming and psychologically defeating for 13-year-olds. That would be unkind.