This document discusses different types of problem students in schools. It identifies two main types of problems - failure or inadequate academic performance, and unacceptable behavior. It then profiles 20 different problem students, describing each by a nickname and their known characteristic behavior issues. These include students who are aggressive, annoying, argumentative, talkative, disruptive, absent, inattentive, shy, cheating, sleeping, stealing, foul-mouthed, unhygienic, or have special needs.