• 学年がくねん — school year / grade level
• 学力がくりょく — academic ability
• 学習がくしゅう — learning / study
• 入学にゅうがく — school admission
• 学者がくしゃ — scholar

“学” is one of the most fundamental kanji for students. It’s widely used in words for schools, education systems, and fields of study.

The original form depicted a child under a roof — symbolizing the idea of learning or teaching in a place.

日本にほんで日本語にほんごを学まなんでいます。
I’m studying Japanese in Japan.

大学だいがくで音楽おんがくを勉強べんきょうしています。
I’m studying music at university.

This kanji is read “gaku” in words like gakumon (study). But in gakkou (school) or gakkyuu (class), the “k” sound is doubled. It’s a natural sound change in Japanese.