aSmall = fewer than 600 students enrolled, medium = 600-1,800, and large = more than 1,800.
bMeasured by percentage of students eligible for free or reduced-price lunches: very low = 5 percent or less, low = 6-25 percent, medium = 26-50 percent, and high = 51-100 percent.
NOTE: AP = Advanced Placement, IB = International Baccalaureate, NA = not available. AP and IB courses were coded separately in 1998 and 2000 but not in prior years. AP/IB courses are counted both in their specific columns and in columns that correspond to the general course category. For example, AP chemistry is included in the “any chemistry” column in addition to being listed in its own column. Before 1998, AP and IB courses were coded with the general set of courses.
SOURCE: National Science Board. Science and Engineering Indicators 2004. NSB 04-01. Arlington, VA: National Science Foundation, 2004. Appendix Table 1-11. This table was based on US Department of Education, Center for National Education Statistics, High School Transcript Studies, various years.