This week in Upper West, many of the 4th and 5th grade students worked on fractions, while some, along with the 6th grade students worked on decimals. Unique to Montessori are the fractions circles and insets, which offer concrete ways to find equivalences, add/subtract/multiply/divide, reduce, and many other fraction concepts before they are done abstractly. The same can be said with the Montessori decimal materials.