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Education outside the classroom in Germany: An interdisciplinary multi-methods Study Protocol
- Anna Brandmeier,
- Melissa Börner,
- Theres Mühlberg,
- Leonie Schulz,
- Lukas Kleinhenz,
- Theresia Endriß,
- Stephan Ellinger,
- Jan Schmid-Ellinger
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- Published: June 23, 2026
- https://doi.org/10.1371/journal.pone.0337524