Assessment activities are crucial to measuring learning success in the school system. Assessment can be used to improve education where teachers incorporate Islamic beliefs. This study explains how to create a religiously-integrated mathematical communication skills test. This is ADDIE model development research. The research was tested at a Tulungagung Madrasah Aliyah. The data-gathering method solves ten inverse function math questions using a description test. Data analysis uses strength, reliability, validity, and difficulty. This study found that the social essay exam instrument analyses high school students' mathematics communication skills and Islamic beliefs, with 7 items valid and reliable and 3 items removed. This study found that the Islamic integrated mathematical communication ability test is valid, reliable, discriminatory, and somewhat demanding.
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