In response to the main federal K-12 law, the Every Student Succeeds Act (ESSA) and the teacher education program standards, teacher education programs have tried to address social and emotional learning (SEL) content in their curricula. Adding information on SEL alone may not be enough to overcome the shortenings of many existing early childhood programs. The current study attempted to address these shortenings through the inclusion of specialized SEL strategies and sample activities in addition to traditional content on social-emotional learning and development. This study was organized within a quasi-experimental design framework. One hundred thirty-nine preservice teachers were divided between control and treatment groups. The treatment group was exposed to the intervention (i.e. additional/special SEL strategies and activities) in the modified Nurturing Children's Social Competence class, while the control group was in the traditional version of the same class (i.e. traditional instruction with no additional/special SEL strategies and activities). All students were surveyed using the SEL Beliefs Scale for Preservice Teachers and the SEL Knowledge and Attitudes Scales for Preservice Teachers. The surveys were conducted at the beginning and at the end of the semester. An exploratory factor analysis, MANOVA, and descriptive discriminant analysis were used to analyze the data. Findings revealed that preservice teachers in the treatment group gained greater knowledge about (a) SEL in general, (b) the development of SEL skills in young children, and (c) implementation of the SEL strategies in the classroom. In addition, preservice teachers in the treatment group developed more positive attitudes toward implementation of SEL strategies and the importance of teaching social and emotional skills to young children. Even though SEL beliefs did not predict treatment / control group differences, there were statistically significant differences in the development of SEL beliefs within each group. Preservice teachers in both groups highly believed that creating a SEL environment in the classroom and schoolwide is essential.