 LEAP serves students who are newly arrived immigrants to the United States and have a limited understanding of the English language.But for these students who are pursuing their high school diploma, there is the additional problem of not understanding the background knowledge of a core subject that they would have learned had they been in an American educational system in their early years.Such core subject areas could be, United States and World history, science, economics, mathematics, etc., which may have had a different focus, or even not taught at all in their home countries.