Yes. L-2 children may study in the United States as dependants and do not need a separate student status. They may not work, and their L-2 status ends when they turn 21 or marry.
School is straightforward; the older child's timeline is the thing to watch
Hypothetical example: the technician's children are 12 and 19. Both may be admitted as L-2 dependants for the period of the principal's status, and both may enrol in school; the older one may attend college without changing to student status while L-2 remains valid. The 19-year-old, however, will age out of L-2 at 21. If the assignment runs two seasons and possibly longer, plan now for what happens then: a change to F-1 student status, a return to Canada, or a route of their own. Neither child may take a job, including part-time or summer work, while in L-2. The spouse, by contrast, is employment-authorized incident to status. School districts usually ask for proof of residence and immunization records rather than immigration papers, but carry the I-94 records for each family member. Keep every dependant's admission tied to the principal's validity dates.
Hypothetical example: a packaging-machinery company transfers its calibration specialist while the spouse plans to continue a remote Canadian job and the child wants to finish secondary school in the United States. The family must decide where the work is physically performed and whether payroll, tax, and school arrangements match the admission period. Remote work does not erase the need for proper employment authorization or local compliance. At intake, list every family member, their passport expiry, relationship proof, intended travel date, and any separate professional requirement. A marriage certificate and birth certificates settle dependency; an employer email does not. Confusion commonly arises when the family assumes the child's school calendar extends status or when a spouse's employer treats an immigration document as a complete tax and labour-law answer.