<![CDATA[The main problem face by teachers in heterogeneous classes is how to choose and teach subjects properly. The subject may too difficult for a low level students (Elementary School) or too easy for a high level students (Secondary School). Puzzle-based learning applied as an alternative solution for teaching in heterogeneous classes in plane geometry topics. Puzzle-based learning can create interesting learning situations for low levels students and not boring for higher levels students. Furthermore, puzzle-based learning can also increase motivation, activity, argument, and conceptual understanding. The understanding of subject indicated by the student's score after attending the lesson with a high average, which is 80.17. In the end, the teacher found that most of the students viewed puzzle-based learning as useful for learning, especially in mathematics and science.]]>
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