Abstract: Abstract The purpose of this study was to develop a guided inquiry-based teaching material to see an increase in students’ critical thinking skills with this type of Research & Development research. Starting from a preliminary study, analysis of student needs, literature study, and field observation, followed by designing a guided inquiry-based teaching material. The teaching materials developed arranged according to the phases in guided inquiry, then assessed by material expert validators and design experts. Teaching materials are also a...
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Topics: 
Mathematics education