Sorting by Size

Sorting by size develops visual discrimination and logical thinking while preparing for mathematical concepts.

• Framework: Montessori
• Unit: Practical Life
• Learning area: Preliminary Exercises
• Level: Ages 3-4

Objectives

• Develop visual discrimination
• Practice categorization
• Build decision-making skills

Materials

• Objects in three sizes (small, medium, large)
• Three sorting containers
• Sorting tray

Instructions

1. Place mixed objects on tray. 2. Examine each object. 3. Decide if it is small, medium, or large. 4. Place in corresponding container. 5. Continue until all sorted. 6. Mix and repeat if desired.

Educator tip

Start with dramatically different sizes before progressing to subtle differences. Use familiar objects.

Assessment

Child correctly sorts all objects by size.

More from Practical Life

• Opening Containers
• Folding Dish Towels
• Using a Timer
• Crinkling Paper
• Stacking and Nesting
• Using a Clothes Pin
• Pushing in Chairs
• Sharpening a Pencil