Newcomers are students who have recently immigrated to a new country, may be learning English as an additional language, and may have varying levels of English proficiency. This guide introduces five key areas of consideration when planning instruction to meet the unique social-emotional, linguistic, cultural, academic, and programming needs of multilingual learners of English who are newcomers. It includes strategies and best practices for language assessment and academic instruction through the proficiency levels, and guidance on how to advocate for effective newcomer education.