Begin with the database Education Research Complete (accessible at the following URL: http://nyit.edu/library/find_resources/education).
To find articles on "Hispanic graduation rates," you may want to try one of the following searches:
Hispanic American students AND graduation rate AND high school
Hispanic American students AND graduation rate AND (college OR university OR higher education)
To find articles on "English as a second language," you may want to try the following searches:
English language AND (study & teaching) AND foreign speakers
You may want to consider narrowing down this topic further. You can do so by limiting your search to a specific population (e.g., Spanish speaking students, Korean speaking students), location (e.g., United States, New York State), a particular teaching method, etc. You may also want to consult one of our other education-focused databases, accessible at the following URL: http://nyit.edu/library/find_resources/education.