- Heavy duty precision: This large protractor for teachers is designed for durable use, featuring a wear resistant ABS body that is reusable, retains its shape and resists damage from frequent handling. - Scratch free handling: burr free edges with a smooth round finish to prevent cuts or scratches during use. - Lightweight and easy to use: The protractor has a lightweight structure for comfortable classroom use and minimizes risk of injury. - Enhanced readability: Large scale design with clear numbering for easy measurement and accurate results. Applications: - Classroom geometry: measure and verify angles during lessons, check students drawings, and facilitate instruction. - Drafting and design activities: measure angles on plans and models in student projects. - Arts and crafts and assembly: ensure precise angle alignment in projects requiring accuracy.