As the population of English-language learners grows exponentially across the nation, districts not traditionally considered immigration magnets suddenly find themselves with a need to come up to speed on implementing the most effective English as a Second Language (ESL) program model. The key to implementing a successful ESL model is to match the program to the language needs of the students--not to the needs of a stand-alone ESL curriculum. The process of matching student needs begins with conversations about student data, conversations that are informed by a schoolwide team comprising classroom and ESL teachers, content specialists, and administrators. This article discusses a five-step process which leads to an informed decision about the best delivery model to select.