In 2016, six of six American Nobel Prize winners in science were immigrants. The numbers of U.S. educated graduates who enter the Science, Technology, Engineering, and Mathematics (STEM) fields have been on the decline, and policymakers and educators have continually sought new policies and programs to try resolve this problem with long-term solutions. In recent years, several Alabama schools have implemented Project Lead the Way (PLTW), a program that is aimed toward promoting students' interest in STEM. The purpose of this qualitative multiple case study was to explore how Alabama's educators perceived the use of constructivist pedagogy in PLTW on student learning behaviors and student interests in science and mathematics. Piaget's developmental theory and Vygotsky's social developmental theory provided the theoretical framework for this study. The data collection procedure for this multiple case study included one-on-one interviews with 23 educators in four Alabama PLTW schools. Themes that emerged from the study included motivation and enthusiasm, critical thinking and problem solving, career awareness, student interest in science and math, collaboration, hands-on learning, confidence and engagement, perceived problems, and satisfaction with PLTW. All interviewees perceived that with PLTW's emphasis on constructivist pedagogy, students were excited, engaged, practiced critical thinking and problem solving skills, and that participation in PLTW had a positive effect on the students' learning behaviors and interests in science and mathematics. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]