This lesson focuses on 5.NF.A.1 -add (and subtract) fractions with unlike denominators, using equivalent fractions. Students demonstrate and build on their prior knowledge of adding fractions with like denominators. Students represent and explain their thinking, asking questions and providing comments to one another. Core Actions 2 and 3 are strongly exhibited in this lesson.
Adding Fractions (Coverley-Paxton)Download
3C: In this part of the video a student is explaining the strategy he used to show how he arrived at his answer. Another student agrees with what the student did and restates what the student did.
2C: In this clip, students are sharing their thinking at the board. Students with different strategies approach the board and demonstrate their solution methods. Other students are agreeing and disagreeing with their classmates, and explaining why.
3D: In this part of the lesson, a student has gone up to the board and shared her solution method for 1/4 + 2/6. The teacher invites students to comment and ask questions to the student at the board. Students are clarifying their own understanding through comments and questions.
3A: Here the teacher helps facilitate a conversation among the students by asking the student at the board questions to further his explanation. The teacher proceeds to ask the students, "why is it important to have common denominators?"
2A: In this part of the lesson the teacher is explaining why having common denominators is important in adding fractions. The teacher begins by asking students to represent the numerator and denominator with their fingers. Then she draws a rectangular model on the board. After that she folds a piece of paper and rips it into pieces (and refers to it as pieces of chocolate) to demonstrate different sizes.