Jakarta Depdiknas — Depdiknas. 2008. Panduan Pengembangan Bahan Ajar.

“Because my father does it every day,” he said, grinning.

Years later, when Andi became the first person from the village to attend university, he didn’t pack a fancy laptop or new shoes. He packed that twine-bound booklet.

The next morning, she threw away her apple drawing.

One afternoon, after failing yet again to explain fractions using the standard “cut an apple” example—most of her students had never seen a fresh apple, only the shriveled ones from the market—she picked up the Panduan . She flipped past the bureaucratic jargon and landed on a dog-eared page she had missed before: “Mengembangkan bahan ajar dari lingkungan sekitar.” Developing materials from the surrounding environment. “Because my father does it every day,” he said, grinning

The new curriculum had arrived like a sudden monsoon. The old textbooks, the ones with the dog-eared corners and familiar exercises, were declared obsolete. In their place, teachers were expected to create their own bahan ajar —teaching materials—tailored to the students’ local context.

Ibu Ratna had been a teacher for twenty-two years, but for the first time, she felt a cold knot of panic in her stomach.

That night, instead of forcing abstract problems, she walked to the harbor. She watched the fishermen divide their catch. She saw how a pile of 60 fish was split into three equal shares for three families. She saw how a large tuna was cut into six portions, each representing 1/6. The next morning, she threw away her apple drawing

And when someone asked him why, he simply said: “That’s the book that saw my world. Not the world they thought I should have.”

For the next month, Ibu Ratna became a different kind of teacher. She wrote new chapters. Fractions became pecahan nelayan (fisherman’s fractions). Reading comprehension used stories of the ombak (waves) and perahu (boats). Science lessons measured the salinity of the water from the bay.

“How do you know?”

She had spent every night for a week staring at a blank computer screen. The words from the thin, gray-covered manual— Depdiknas. 2008. Panduan Pengembangan Bahan Ajar —kept echoing in her head. “Prinsip: relevansi, konsistensi, kecukupan.” Relevance. Consistency. Adequacy. They were just words until you had to breathe life into them.

Andi’s hand shot up first. “Twenty-five, Bu!”

She bound the sheets of paper with twine and called it “Bahan Ajar Berbasis Budaya Bahari.” It was not perfect. The typing was messy, the diagrams hand-drawn. But on the cover, she proudly wrote the source that had finally made sense: Depdiknas. 2008. Panduan Pengembangan Bahan Ajar. Jakarta. The new curriculum had arrived like a sudden monsoon

Her school was in a small fishing village on the coast of Java. Her students, like Andi and Sari, came to class with the smell of salt and dried fish on their uniforms. They knew tides better than tenses, and currents better than calculus.