# Implementation of the Problem Base Learning Model combined with E-STEM Based Student Worksheets on Learning Outcomes and Self Efficacy on Environmental Pollution Materials

> Research article (Jurnal Penelitian Pendidikan IPA, 2021) · cited 16× · AI/ML

**Wikidata**: [openalex:W3214997940](https://www.wikidata.org/wiki/openalex:W3214997940)  
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