1. academic year; school year
2. year in school; grade in school
Wikipedia definition
3. Educational stageOften, people are educated through a series of educational stages, such as primary school and university. They vary around the world, and not every person will attend the same stages. Some countries describe the different stages in years, whereas other countries use a system of grade levels.
Read “Educational stage” on English Wikipedia
Read “学年” on Japanese Wikipedia
Read “Educational stage” on DBpedia


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