The effect of a new prelaboratory procedure on students' achievement in chemistry

The primary purpose of this study was to develop an alternative model, the Prelaboratory Preparation Period (PLPP), to be used to introduce freshman level students to weekly laboratories and to evaluate student academic achievement as the result of attending the Prelaboratory Preparation Period. The sample was composed of 233 students taking introductory chemistry at Auburn University. The data were collected over a four quarter period of time. A posttest‐only control group design with five experimental and three control groups was used to investigate the effect of the Prelaboratory Preparation Period. A Multivariate Analysis of Variance (MANOVA) was used to determine if significant differences existed between academic achievement of the experimental and control groups. Results of the analysis indicated that a significant difference (α = 0.05) in academic performance existed between the two groups. It was concluded that the Prelaboratory Preparation Period increased the academic achievement of students enrolled in an introductory chemistry course.