Unmatched reliability Resistant to deformation and damage from frequent use, this large protractor provides precise, dependable measurements for classroom work. Safety first Crafted with precision and burr-free edges, with rounded corners to prevent cuts. No rough edges to scratch or harm users, making it suitable for students of all ages. Easy to use Designed for educators, with lightweight construction that supports effortless handling and straightforward classroom demonstrations. Enhanced visibility Features a large, clear numerals design for quick and easy reading of measurements from across the room. Applications and use scenarios - Geometry lessons: measure and verify angles on diagrams, shapes, and student projects to reinforce concepts. - Science and engineering activities: align instruments and check angles on ramps, fixtures, or experimental setups. - Classroom demonstrations: read measurements easily during whole-class instruction and quick checks.