Text and tables of national elementary school trends illustrate that private elementary school enrollment comprised 11 percent of national elementary enrollment in 1970 and is expected to peak at 12 percent in 1987. Catholic elementary enrollment in 1965-66 was 89 percent of the private school enrollment, but by 1978-79 the figure had declined to 66 percent. State-by-state and regional estimates of Catholic elementary school operating revenues and expenses are shown with the caveat that the value of the contributed services of religious community members or clergy is generally not recorded. Despite fewer students and schools, higher salaries and other costs led to the national per pupil cost in 1982-83 of $782, a 19.8 percent increase over 1980-81. Nationally, sources of revenue for Catholic schools are 46 percent from parish subsidies, 43 percent from tuition, and the remaining 11 percent from fundraising activities. In 1970-71, about 72 percent of the Catholic schools charged less than $100; by 1983-84, only 29 percent charged less than $300. Other figures show that an increasing percentage of Catholic elementary schools have less than 300 pupils; nationally, about half were in the 21-18 pupils-per-teacher range, and 22 percent had less than 21 pupils per teacher. (MLF)