 Academic intensification has also reduced differences in the academic experiences of public vs. private school students.Despite some loosening of high school tracking systems, most schools remain highly differentiated, with policies that encourage students to take the same level of coursework in different subjects.In a study of high school tracking policies in North Carolina, Kelly and Price (2011) report that the typical school had five or more levels of mathematics, with some schools having three or more levels of Geometry alone.