Chi and Wylie's (2014) Interactive Constructive Active Passive Framework (ICAP) was used as the foundation of a teacher led intervention using small group instruction with manipulatives during mathematics instruction to provide developmentally appropriate instruction to kindergarten students in a rigorous academic program. This action research mixed-methods study was conducted in a full-day self-contained kindergarten classroom to ascertain the effects of this mathematics instruction method on students' levels of engagement and attitudes. Over the course of six months, twenty mathematics lessons were recorded to gather data for the study. Quantitative data included measuring time-on-task, teacher behaviors ICAP level, student behaviors ICAP level, as well as a Student Attitude Survey that was conducted at the conclusion of the study. The Student Attitude Survey was presented in a modified Likert Scale format due to the age and reading ability of the participants. Qualitative data was gathered in the form of lesson transcripts. Twenty-two students and one classroom teacher participated in the study. Students ranged in age from five to six years old, and eleven participants (50%) were male. The results of the study showed that the use of small group hands-on instruction in mathematics had a positive effect on student engagement based on students' time-on-task during the activity, as well as positive student attitudes toward mathematics as indicated on the Student Attitude Survey. Lesson transcripts and both teacher and student ICAP rubrics provided further support for the innovation.