The Supreme Court of the United States has held that a public school student threatened with suspension of ten days or less is, absent danger or emergency, entitled to prior notification and a rudimentary hearing.
Goss v. Lopez, 419 U.S. 565 (1975).
Michael J. Lydon,
Constitutional Law - Fourteenth Amendment - Due Process - School Suspensions,
Duq. L. Rev.
Available at: https://dsc.duq.edu/dlr/vol14/iss2/9