Journal of Chemical Education 9/30/21 Page 9 of 22 Another method of comparing students' progress is to examine how many students increase (move up) in their performance percentile group over the course of the semester. Fig. displays such data for the second semester of the study (similar data exist for the first semester). The shift of the number of students from a performance future use is not just as a research instrument, but also as a standardized freshmen college readiness assessment instrument.