It sounds like a challenging situation. If you genuinely believe that your son's abilities were not accurately represented due to the stress of starting a new school, it might be worth discussing this with the school and asking for a reevaluation. Explain your concerns calmly and provide any supporting information you have from his previous school. However, it's also important to consider your son's feelings in this. If he seems happy and engaged with his current classes, pushing for a change may not be necessary. If you're planning on moving him to a charter school soon, this might also affect your decision. The ultimate goal is to ensure your son has the best possible learning environment for his needs.