The levels of performance in a twofold Criterion Referenced Test covering different objectives of 12th grade biology contents is used to evaluate that curriculum. The test was taken by two samples of first year college students. Two analyses of variance were conducted: one between levels of performance on the test (number of criteria passed) and grades on the Spanish Biology Entrance examination test; the other between performance on the test and grades in first year General Biology, to explore both causes and consequences of entering university studies with those levels of performance.