What we like about this lesson

Mathematically:

• Addresses standards 5.NF.A.1, 5.NF.A.2
• Provides concrete examples for the need of like denominators for addition and subtraction of fractions
• Allows students to understand adding fractions with unlike denominators without going straight to the least common denominator
• Asks students to reason about how the size of units changes as they create equivalent fractions
• Encourages students to look for and make use of structure as they analyze rectangular fraction models (MP.7)

In the classroom:

• Uses concrete and pictorial models, particularly the rectangular fraction model, to make the mathematics of the lesson explicit
• Prompts students to share their developing thinking
• Allows for whole group, partner, and individual work in one lesson
• Gives formal and informal opportunities for teachers to check for understanding