Project-based learning is gaining popularity as a student-centered approach to education. It provides a multitude of benefits, especially compared to the practices surrounding standardized testing. The purpose of this action research study was to examine and improve teaching practices related to project-based learning at the elementary school level. Project-based learning is defined as an instructional approach in which students are actively engaged in collaborative problem solving. This study examined how teachers implement project-based learning in elementary classrooms and provides information about the best teaching practices for student learning outcomes, engagement, and collaboration. Participants for this study consisted of a team of fifth-grade teachers at a small elementary school in Virginia. Cycle 1 findings provided data on project-based learning as it relates to engagement and developing 21st-century skills, including collaboration. Project-based learning was shown to foster 21st-century skills and impact student engagement. Action steps were designed, implemented, and evaluated in Cycle 2 to develop and examine a collaborative project-based learning experience for three classes of fifth-grade students. The action research study evaluated a teacher interview, classroom observations, and survey data. The findings are: (a) project-based learning resulted in high levels of student engagement, (b) project-based learning provides students with opportunities for collaboration, and (c) project-based learning experiences impact student learning outcomes. Implications for the organization include incorporating collaborative project-based learning experiences into instruction. Learning experiences should provide opportunities for sustained engagement and include authentic assessment practices. [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.]