We now know how "best" to teach our students -- student-centered learning. Yet many of us face challenges when trying to design courses that are student-centered. In this paper, we present our experience with a Web 2.0 technology, VoiceThread, that has helped us address some of the challenges we have encountered when designing student-centered classrooms. We share our VoiceThread activities, and we discuss how mathematics educators and mathematicians can continue studying how to effectively use VoiceThread in face-to-face, blended, and online math courses.