A Florida kindergartner was sent to a mental health center against her mother’s wishes and held there for 48 hours this month after she reportedly threw tantrums at her school.

The student, 6-year-old Nadia King, was just starting her day at Love Grove Elementary in Jacksonville on Feb. 4 when her mother, Martina Falk, received a call from a mental health counselor at the school saying that the girl “was out of control and throwing a tantrum.”

“The school called me after the decision to Baker Act was made,” Ms. Falk said on Monday, referring to a Florida law that allows the involuntary commitment — for up to 72 hours — of people who are judged by certain authorities to be an imminent danger to themselves or others.

Tracy A. Pierce, a spokesman for Duval County Public Schools, said it was Child Guidance, a crisis-response firm, that decided to have the girl admitted to the mental health center — not the school.