voluntary practice by oneself (as opposed to mandatory group practice)

(education) workbook

(education) The 1,026 kanji taught in primary school; a subset of 常用漢字 (じょうようかんじ, jōyō kanji)

smaller kanji historically used as a pronunciation guide, similar to modern furigana

kanji approved for regular use by the 文部科学省 (Monbu-kagaku-shō, “Japanese Ministry of Education”)

Sino-Korean vocabulary or "Hanja-eo"

The iteration mark 々, which indicates that the previous kanji ought to be repeated.

Alternative spelling of 漢字返し

(orthography, historical) tōyō kanji (kanji that were declared official by the Ministry of Education of Japan on November 16, 1946, later replaced by 常用漢字 (jōyō kanji))

kanji approved for use in names registered in the 戸籍(こせき) (koseki, “family register”)