- The document proposes a "Project 21 Days" challenge where participants wear a purple bracelet for 21 consecutive days without verbally complaining or criticizing in order to break the habit of complaining. - If a participant expresses a complaint, they must switch the bracelet to the other wrist and restart the 21 days. Experts say it takes 21 days to create a new habit. - The goal is to create a more positive classroom environment free of complaints and criticisms by participating in the "21 Days Complaint Free World" movement. Adopting this challenge could lead to benefits like improved mood, relationships, and self-esteem.