This dissertation examines three topics at the intersection of the economics of immigration and the economics of education. First, I study the development of human capital among immigrants by evaluating Arizona Proposition 203 (2000) and Massachusetts Question 2 (2002), which require public school districts to provide one year of Structured English Immersion to English language learner students. Using a difference-in-differences framework, I show that for recent-arrival first-generation immigrants, the two initiatives are less effective at developing English language proficiency than previous programs, such as Transitional Bilingual Education and English as a Second Language. However, I also show new heterogeneity in relative program effect...