LESSON PLANNING, DELIVERY, AND ASSESSMENT
Fraction Kits: Subtracting Fractions with Unlike Denominators
Lesson Plan: Fraction Kits: Subtraction Mixed Numbers with Unlike Denominators
Process: Students will use models to visualize subtracting fractions, and understand how the models relate to the algorithm.
Fraction kits and math journals for each student
Motivator (5 minutes):
Instruct students to take out their fraction kits, math journals, and homework.
Independent practice (10 minutes):
Instruct students to use fraction kits to complete warm-up problems. Circulate and help as necessary.
Model instruction/check for understanding (40 minutes):
A. Have student volunteers explain how to complete warm up problems using magnetic fraction kits.(10 minutes)
Regroup/Summarizing (5 minutes):
Have the students review the algorithm as written in their math journals
Closure (10 minutes):
Have students complete exit card.
Click here to see my university's supervisor's comments on this lesson.
AssessmentThe assessment for this lesson was an exit card, with two mixed number (unlike denominator) addition problems, and two mixed number (unlike denominator, no regrouping required) subtraction cards. From these exit cards, I was able to divide the math class into three approximately equal groups to further instruction the next day. Those who could successfully complete both addition and subtraction problems were given enrichment problems (word problems involving mixed numbers)to work on as a group. Those who could successfully add, but not subtract, were given subtraction problems to work through, as a group, using their fraction kits. I did guided practice with those who could not navigate either type of problem (usually because they still could not provide equivalent fractions with the same denominator for each mixed number). In this case, my assessment tool guided my teaching practice the next day.