This document discusses the differences between social language (BICS) and academic language (CALP) acquisition for English learners. It states that students can develop social language proficiency within 2-4 years through informal interactions, while achieving academic language proficiency takes 5-7 years and requires mastery of cognitive skills. Formal schooling in a student's first language significantly impacts their ability to acquire both types of English language skills by transferring knowledge between languages. The document prompts readers to consider questions about assessing levels of language acquisition for a hypothetical student named Ha.