The objectives of this study were to develop and evaluate a large group teaching model of Calculus 1 at Suranaree University of Technology; to examine the students’ opinion on the model; and to investigate the association of the background, studying behaviors, and opinions of students between students who passed and did not pass the final examination in Calculus 1. The population consisted of all 1,159 students of Suranaree University of Technology who registered in Calculus 1 in the first trimester of 1998 and a sample of 550 students was randomly selected from this population. The sample data were collected from the students’ achievement test scores, the participation in the course activities, and the opinions on the teaching procedures, learning behaviors and other aspects by using questionnaires. The descriptive statistics were used to analyze the general data of students. The Chi-square test was applied to infer the association of the background, studying behaviors, and students’ opinions between students who passed and did not pass the final examination in Calculus 1.