The University of Puerto Rico in Mayaguez (UPRM) has found that there are disadvantages to a semester long remedial mathematics course that is administered during the freshmen year to students with mathematics deficiencies in STEM (Science, Technology, Engineering and Math) programs. Correspondingly, the UPRM designed and implemented an Accelerated, Online, Adaptive Approach to Developmental Mathematics that was administered the summer before students in STEM fields entered the UPRM. This article discusses the theoretical factors in the design of the online course and presents a study of the effectiveness of these two approaches based on (i) the success rate of students being able to enter Precalculus and (ii) the success of students from the two programs upon entering Precalculus.