This term in Geometry we started using our protractors and discovered that our Montessori fraction pieces can be drawn as angles:
1/3 corresponding to 120 degrees
1/4 corresponding to 90 degrees
A nice summary of fractions and their angles
Adding fractions and calculating the new angle
Adding fractions and calculating the new angle
Geometry class with Montessori fraction pieces
The Montessori Protractor with angles and fractions
The Troutbeck School 