This study was designed to help students decide whether or not to register for a general chemistry course. High school grade point averages (GPAs) and American College Testing (ACT) scores were obtained on over 600 students from New Mexico State University and were entered into correlation analysis with chemistry grades. A "Chemistry GPA" was determined for each ACT score and for each interval of 0.1 in the high school GPA and then was plotted versus the appropriate ACT scores or high school GPAs. It was found that students who had a high school GPA below 3.3 or a composite ACT score below 19 had less than a 50 percent chance of obtaining a grade of C or better in the general chemistry course. Courses are suggested for students to take prior to taking the general chemistry course. (ML)