Why won't my child speak at school?

What might be going on

What you are describing is the hallmark pattern of Selective Mutism -- an anxiety-based condition where a child who can speak normally in comfortable settings is consistently unable to speak in other settings, most commonly school. Selective Mutism is not shyness. Shy children eventually speak when they feel comfortable. Selective Mutism is a physical inability to speak in triggering settings -- the child is not choosing to be silent and cannot simply decide to speak. The mechanism is anxiety: the school setting triggers a freeze response in the child's nervous system that makes speech physically unavailable. The child understands everything, has plenty to say, and desperately wants to communicate -- but cannot. Selective Mutism is frequently misread by schools as defiance, intellectual disability, or attention-seeking. It is none of these things.

• Selective Mutism
• Anxiety

What this is not

Your child is not being deliberately difficult. They are not choosing silence as a power play. They are not showing signs of intellectual delay. The gap between who they are at home and who they appear to be at school is a symptom of an anxiety-based neurological condition -- not a description of their actual capabilities or personality.

What you can do

The most important thing to do right now is to name Selective Mutism specifically when speaking to your child's paediatrician -- it is still not widely known by all healthcare providers and you may need to be explicit. Speak with the school as well. The school's response to Selective Mutism matters enormously: pressure to speak makes it significantly worse. A mental health professional experienced in Selective Mutism can provide effective, graduated approaches that work with the anxiety rather than against it.