Your teenager is quieter. Their sleep has changed. Conversations are shorter. Every item on that list also describes a perfectly normal fifteen-year-old, which is why parents explain it away. Chris Coulter on the difference between teenage moodiness and something worth attention, the six questions that separate a bad week from a pattern, and why knowing your child's baseline matters more than knowing the warning signs.

Eleven years after losing his 14-year-old daughter Maddie, Chris Coulter writes a letter to the father he was in early 2015. What he would tell him about "fine," about quiet, about staying one question longer. What that father got right. What he couldn't have known, because nobody teaches parents what to look for. For every parent carrying guilt, and every parent with a teenager home tonight: grace.

Maddie would have been 26 today. Twelve birthdays without her. The Teen Signal Check she inspired has now been taken by more than 10,000 parents. 48% had their instincts confirmed. This is about silence, awareness, and the window parents have before worry becomes crisis. Three minutes tonight could change what happens next.

48% of parents who took the Teen Signal Check discovered their teen needed more attention than they realised. 52% Green. 30% Yellow. 18% Red. Three minutes. 14 questions. Built by a father who missed the signs and spent everything he had since making sure other parents don't. Free at thementorwell.com.