訓 やど ・ 音 シュク
Sino-Vietnamese: túc
宀 (roof) over 亻(person) and what was drawn as a sleeping mat: a traveller bedded down under someone else's roof. An inn, lodging — 宿題 homework.
Stroke data: KanjiVG (CC BY-SA 3.0) — kanjivg.tagaini.net
宿題を忘れました。 (しゅくだいをわすれました)
I forgot my homework.