Administrators in the Chicago public schools are seeking to strike the right balance between providing guidance and permitting flexibility as they put in place the nation's first state mandate for providing bilingual education to preschoolers. New rules approved by the Illinois state board of education in June flesh out a January 2009 change that essentially extends the same requirements for educating English-language learners in K-12 public schools to 3- and 4-year-olds in public preschool centers. The new rules say that if a public preschool center has at least 20 students who speak the same language, it must offer bilingual education. By July 2014, they also say, all lead preschool teachers with ELLs in their classrooms must have an endorsement in bilingual education or English as a second language. Currently, many Illinois preschools rely on teacher assistants to provide native-language support to youngsters. The rules come at a time when states, such as California and Texas, with large numbers of children from immigrant families are focusing more on how to support the education of pre-K English-learners. But not everyone agrees that Illinois has taken the right path in its quest to extend bilingual services to younger children.