Synthese: Journal of Synthesis in Mathematics Education provides immediate open access to all published content, based on the principle that making research freely available to the public supports a greater global exchange of knowledge.

All articles published in this journal are:

• Freely available online to read, download, and share without subscription barriers.
• Published under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.
• Indexed, archived, and preserved to ensure long-term accessibility.

This open access policy reflects the commitment of Nusantara Academic Press to advancing mathematics education research by promoting accessibility, visibility, and wider dissemination of scholarly work worldwide.