This Helix Clear School Teaching Protractor is a must-have for any teacher or student in need of precise angle measurements. Its 180° acute and obtuse markings make it easy to read and interpret, while its clear colour allows for easy visibility in any room. Whether you're using it for art, math, or music, this protractor is sure to be a valuable addition to your collection. Made by the trusted brand Helix, this protractor is built to last and provide accurate readings for years to come. Its compact size and lightweight design make it easy to carry around, while its sturdy construction ensures it can withstand even the most rigorous of classrooms. Invest in this essential tool today and take your learning to the next level.