abstract: This study investigated the effects of different types of play-embedded instruction on preschoolers' vocabulary learning during a vocabulary intervention known as Say-Tell-Do-Play (STDP). The goal of this study was to determine whether or not two types of play - Story Drama and a Vocabulary Matching Game - enhanced the effectiveness of the STDP strategy. To investigate this goal, the researcher implemented the STDP instructional routine for 17 children with three different picture books and their corresponding play activities and a control condition (Drawing) in a counterbalanced order. Descriptive statistics were utilized to understand the effects of these different play activities on the children's receptive and expressive vocabulary learning. Findings showed that the STDP vocabulary instructional strategy had a much larger impact on children's receptive vocabulary than on expressive vocabulary learning. The play activities did not seem to make much difference in the learning of receptive and expressive vocabulary. The results indicated that the STDP strategy is an effective way to teach receptive vocabulary. There was a lack of evidence that the different types of play significantly affected children's vocabulary learning. / Dissertation/Thesis / Ph.D. Curriculum and Instruction 2012