How to Handle Stress for Middle School Success: Kid Confident Book #3 defines stress and anxiety, and explains how it manifests physiologically and cognitively. 

Kid Confident (Book #3): How to Deal With STRESS and WORRIES in Middle School
 
A Note for the Adults in Your Life
What’s Inside: Meet the Players
And… An Introduction for You!
 
Level 1. Stress Explained!
Level 2. Your Brain & Three Parts of Stress
Level 3. Health in Check! Eating, Exercise and Sleep
Level 4. Chill Hacks
Level 5. Formula for Bravery
Level 6. Feeling the Feels
Level 7. Brain Mistakes and Glitches
Level 8. A “Can Do!” Attitude and Identifying your Strengths
Level 9. Update Your Software!
Level 10. You did it! Final level: Chill Cheat Sheet!