IPA: /ˈskuːlˌtʃaɪld/
KK: /skulˌtʃaɪld/
A young person who goes to school for education.
The schoolchild eagerly raised her hand to answer the question.
Schoolchild → It is formed from "school" (from Old English *scol*, meaning a place of learning) and "child" (from Old English *cild*, meaning a young human being). The word "schoolchild" refers to a young person who attends a place of learning.
Think of a 'place of learning' ('school') and a 'young person' ('child') — together they describe someone who is a student.
No commonly confused words.