Prior to registration at the Community College of Philadelphia (CCP), most potential new students are given a battery of tests to place them into appropriate courses, specific areas of study, or special support programs. Most students are tested on one day and then asked to return on a subsequent day for counseling and registration. Between October 1984 and September 1985, 7,891 potential students were tested in math, writing, and reading. Of these, 1,090 (14%) had not registered for classes by the fall 1985 semester. A comparison of the test scores of the registrants and non-registrants who spoke English as a native language revealed the following: (1) 40.2% of the registrants and 39.9% of the non-registrants had scores placing them into college-level math courses; (2) 40.1% of the registrants and 27.1% of the non-registrants had scores placing them into college-level writing courses; and (3) 35.7% of the registrants and 24% of the non-registrants performed at college-level on the reading test. Among the potential students for whom English was a second language, there were no significant differences in the placement test scores of registrants and non-registrants. Though, in general, the students who registered had slightly higher scores than those who did not register, many of the students who did not register performed at college-level on the placement tests, suggesting that CCP might consider additional strategies to encourage enrollment when a potential student is tested. (UCM)