Large and easytoread design Bigger size and bold digital display deliver clear visibility for teaching math concepts, angles, and geometry to students of all ages in the classroom or at home. This makes it easier to demonstrate concepts and keep students engaged. Multifunctional teaching tool More than just a protractor, this tool also functions as a compass for geometric drawing and measuring. It combines multiple teaching aids into a practical, versatile solution for math and engineering education. Dry erase board compatible Suitable for use on dry erase boards, with smooth edges that allow easy marking and erasing. This enables quick corrections and interactive learning during lessons. Sturdy and quality construction Made from durable materials, this large protractor is built to withstand frequent handling in busy classrooms, providing longlasting reliability and accuracy for educational purposes. 23 practical use scenarios Classroom demonstrations: use for measuring and illustrating angles and geometric concepts during lessons, with easy marking and remarking on a dry erase board. Home study or tutoring: students can practice angle measurement and geometric drawing with immediate feedback and easy corrections. School labs or engineering projects: apply the protractor as a drafting aid for simple geometric figures and measurements in projects or design tasks.