In light of linguistic diversity within many U.S. classrooms, it has become paramount that technology and engineering teachers provide accessible yet rigorous instruction that supports students' language development. One of the best ways to support emergent bilingual students is to provide rich and robust vocabulary instruction in English, while simultaneously welcoming and encouraging the development of home languages. This article outlines five research-based practices that have the potential to support English-learners' vocabulary development. Using examples from teaching emergent bilingual students in middle and high school TE classes, the article illustrates what each principle might look like in practice.