# Development of Learning Materials Oriented on Problem-Based Learning Model to Improve Students’ Mathematical Problem Solving Ability and Metacognition Ability

> Research article (International Electronic Journal of Mathematics Education, 2019) · cited 197× · AI/ML

**Wikidata**: [openalex:W2914383106](https://www.wikidata.org/wiki/openalex:W2914383106)  
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