Efficient lesson planning with universal design for learning (UDL) enables teachers to more effectively meet students' individual needs. In this study, a comparison of lesson plans by teacher candidates in a teacher preparation program before and after UDL training is presented. After training, teachers (n = 45) incorporated more differentiated options and varied teacher strategies based on UDL principles into their lesson plans, so that the content was more accessible to all students. A variety of changes and options was examined, and examples of commonly occurring choices selected by the teacher candidates were provided. The improved multiplicity of options in lesson planning demonstrates a better understanding of UDL principles; however, teachers need more experience in actually implementing the UDL principles in their classrooms. (Contains 2 figures and 3 tables.)