Abstract
This study aims to construct Algebra Board as a teaching aids for the subtopic of Linear Equations In One Variable Form 1. This study is a design and development study (DDR) based on the ADDIE model in developing Algebra Board. The validity of Algebra Board is determined by three expert panels consisting of two mathematics lecturers from a public university and an experienced mathematics teacher. Questionnaire instrument were used to test the validity of the Algebra Board. Descriptive statistical analysis was used for the purpose of data analysis and the results of the study showed that Algebra Board obtained 92.5% agreement from the panel of experts. In conclusion, Algebra Board have achieved high validity values. The implication of this study is that Algebra Board can be used as teaching aids for the subtopics of Linear Equations In One Variable Form 1.
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