FORT LEE -- The proposal is straightforward and well intentioned: A Korean-English bilingual class where Korean-speaking children would learn English, and English-speaking students would be taught Korean, a language growing in use in pockets of northern New Jersey. But officials are struggling to sell the concept to parents, particularly families of English-speaking students. At School 3, where such a program would be launched, parents raised questions about whether the class, known as a dual-language immersion program, was practical. "English is hard enough as it is to learn," said Maureen Stitham, adding she didn't think the class would be ideal for...