Latino English learners (ELs), among the largest student population in the United States K-12 school system, continue to lag behind their English-proficient peers. They also tend to attend segregated schools, have less-qualified teachers, and lack access to rigorous curriculum, including the arts. Museum education departments have increasingly sought to fill the gap in arts education for underserved populations. This mixed methods study explored the degree to which teaching artists (TAs) from a large metropolitan museum are effectively addressing the art education needs of Latino ELs. The dissertation study occurred in two phases. Phase 1 included quantitative analysis of observations of the TAs using the numeric components and ancedotal evidence of the Observation Protocol for Academic Literacies. Phase 2 consisted of semi-structured interviews with the participants. Findings of the study indicate that while TAs can improve instruction in terms of providing materials of students' native language and providing opportunities to transfer skills between their primary and the target language, they nevertheless use numerous strategies for effective English language instruction. This can inform museum education departments on effective teaching practices of ELs, an area of study that has almost no scholarship. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com/en-US/products/dissertations/individuals.shtml.]