Besi merupakan salah satu logam yang paling banyak dijumpai di dalam kerak bumi. Dengan besi manusia dapat membina kekuatan bangsa dan negaranya, karena dari besi dibuat segala alat perlengkapan pertahanan dan keamanan negeri. Salah satu penerapannya adalah benteng besipada masa Iskandar Zulkarnain. Pendirian benteng besi Iskandar Zulkarnain terdapat dalam al-Qur'an surah al-Kahfi ayat 96-98. Benteng besi Iskandar Zulkarnain merupakan benteng yang terbuat dari peleburan besi dan campuran tembaga. Di dalamnya terdapat reaksi-reaksi kimia yaitu reaksi redoks dan elektrokimia.Penelitian ini dan kisah pendirian benteng besi Iskandar Zulkarnain dalam al-Qur'an dan untuk menjelaskan reaksi redoks dan elektrokimia pada benteng besi Iskandar Zulkarnain. Metode yang digunakan adalah metode penelitiankepustakaan yang berkaitan dengan reaksi yang terdapat pada benteng besi Iskandar Zulkarnain dan nilai-nilai keislaman dalam ayat-ayat al-Qur'an. Hasil penelitian adalah penyampaian pada pendirian benteng besi Iskandar Zulkarnain yang memuat nilai-nilai keislaman serta reaksi redoks dan elektrokimia. Berdasarkan hasil penelitian dapat disimpulkan bahwa pendirian benteng besi tercantum dalam surat al-Kahfi ayat 96-98 serta di dalamnya terdapat reaksi redoks dan elektrokimia karena besi bersifat mudah mengalami korosi.. Iron is one of the most common metals in the earth's crust. With iron, humans can build the strength of their nation and country, because iron is made of all equipment for defense and security of the country. One of the applications is the large fortress at the time of Iskandar Zulkarnain. The establishment of Iskandar Zulkarnain's iron fortress is in the Qur'an surah al-Kahf verses 96-98. The iron fortress of Iskandar Zulkarnain is a fort made of smelting iron and a mixture of copper. In it there are chemical reactions namely redox and electrochemical reactions. This study aims to describe the concept and general picture of the integration of chemical reactions to strength and the story of the founding of the iron fortress of Iskandar Zulkarnain in the Qur'an and to explain the redox and electrochemical reactions to the iron fortress of Iskandar Zulkarnain. The method used is the method of library research related to the reactions found in the iron fortress of Iskandar Zulkarnain and Islamic values in the verses of the Qur'an. The results of the study were the delivery of the founding of the iron fortress of Iskandar Zulkarnain which contained Islamic values as well as redox and electrochemical reactions. Based on the results of the study it can be concluded that the establishment of iron fortifications listed in Surat al-Kahf verses 96-98 and in them there are redox and electrochemical reactions because iron is susceptible to corrosion.

The lack of bridges between formal science taught in schools and indigenous STEM knowledge is a problem that leads to the abandonment of cultural values and local wisdom. This article aimed to (1) describe the traditional salt production process by farmers and their living values education (LVE), and (2) transform indigenous STEM knowledge into scientific knowledge that can be applied to school science learning. This research was conducted in Central Java, Indonesia using observation, interviews, and literature and document review. A qualitative,  ethnographic approach revealed that the traditional salt production process includes (1) draining the land; (2) making plots; (3) draining the pond plots; (4) compaction of the land surface; (5) seawater drainage; and (6) harvesting the salt. Identifiable living values include collaboration, simplicity, happiness, responsibility, and corporation. Indigenous knowledge is found in salt farmers' understanding of the characteristics and the process of salt crystal formation and their use of traditional equipment. Indigenous STEM knowledge can be transformed into school science learning materials as an example of integrating LVE.