Lessons from a Calf/ Mou hitotsu no kyouiku - Ina shogakkou haru gumi no kiroku / (1991)dir. Hirokazu Koreeda

An elementary school in Japan begins an experimental program that frames the students’ curriculum around one single project: the raising of a calf from adolescence to adulthood. Through their work with the calf, the students learn about math, biology, nutrition and numerous other subjects. But after multiple years of investing energy and emotion into their beloved pet, the students begin to realize that the final days of their project may provide them with the hardest and most important lesson of all.