Research suggests that by allowing English Learner (EL) students to use their home languages in science class, they can better express their thinking and build content knowledge through underlying crosslinguistic awareness between languages. However, EL students' educational backgrounds and home languages are incredibly varied. In this case study, we employ grounded theory to explore students' perceptions of their experiences in the context of a "Physical Science and Language Development class" [10]. We use a phenomenological approach to describe how the students experience their home language within this model of a science and language development class. Observation data, online video assignments, and small group, semi-structured interviews were used to find themes related to experiences of using home language in science class. The findings indicate varied student perspectives on the use of their home languages in science class. Some students preferred to use class time to practice using English, while others found value in using their home languages to help better understand science concepts. Student ideologies regarding English-only or multilingual practices for EL students varied. The findings also indicated that providing an opportunity for EL students to use their home languages in an asynchronous online communication platform outside of class was an effective strategy to allow time for students to practice English during science class, yet provide an opportunity to translate between home languages and English.