Circle Measuring Device – Percentage

The Circle Measuring Device – Percentage is a precision-crafted metal protractor designed specifically for use with Montessori circle fraction materials. This tool helps children understand how circle fractions relate to percentages by allowing them to measure each sector accurately. As they align the protractor with the circle pieces, children begin to see how angles, fractions, and percentages connect, strengthening both visual discrimination and mathematical reasoning.

This material is especially useful in upper-primary Montessori math work, where children transition from concrete fraction pieces to abstract percentage and angle calculations. The clear percentage markings support independent exploration, enabling learners to verify their work and develop a deeper understanding of proportional relationships. It is a simple yet powerful tool that enhances fraction study, geometry lessons, and introductory percentage work in a hands-on, meaningful way.

Key Benefits & Learning Outcomes

• Helps children measure circle fraction pieces using percentage markings
• Builds understanding of the relationship between fractions, angles, and percentages
• Encourages self-correction and independent verification of work
• Strengthens visual–spatial skills and mathematical reasoning
• Supports advanced Montessori math concepts such as ratio, percentage, and geometry

Design & Material

• Material: High-quality, durable metal protractor
• Markings: Clear, engraved percentage indicators for accuracy
• Function: Designed to measure Montessori circle fraction angles in percentage
• Age Group: 7+ years (Elementary level)