The purpose of this study was to develop thematic
teaching materials based on local culture on theme 6 namely My
Ideals of sub-themes 2, My Great Ideals. This type of research
was development research (R & D). The research model used was
the research design model for developing 4-D (Four D Models),
consisted of four stages, namely the definition, design, develop
and disseminate by Thiagarajan. The subjects of this study were
the fourth grade students of SDN 103014 Batang Baruar Julu,
SDN 101130 Purba Sinomba and SDN 100930 Sibatang Kayu
totaling 72 students and objects of thematic research based on
local culture. The instruments used were validation sheets,
student responses, and learning outcomes tests. The results
showed that: (1) the instructional materials developed were valid
to use, (2) the instructional materials developed were considered
to be effective in terms of classical student learning outcomes. It
was suggested that local culture-based thematic teaching material
was a tool to assist in the process of delivering learning, the
existence of teachers was still very much needed as a facilitator
and students remain actively involved in the learning process.