The cortex is the crinkly outside bit of the brain.
Adults use the front part of the brain to think, make judgements, organise themselves and interpret emotions shown on people's faces.
In teenagers, this part of the brain is still growing and developing and you use this part of the brain less often than adults.
It is shaped like an almond and is near the middle of our brain. We have two, one on either side of the middle of our brain.
It is very sensitive to danger and gets the body ready to react.
It is involved in our feelings when we have a 'gut reaction'.
Solihull has a course designed specifically for teenagers to learn about their brain. It is free and easy to use. There are also courses for parents to take part.
Use access code 'TARTAN' to unlock the free online course, click: UNDERSTANDING YOUR BRAIN