The Collaborative Problem Solving model (CPSM) is a methodology that works within the underlying philosophy that all children and young people do the best they can within the environment they exist in. If a child or young person can be successful, they will be. It looks at the expectations placed on the child or young person and draws comparisons to the child’s skills. When mismatches occur, the child does not have the skill to meet the expectations, and often result in behaviours that challenge.