Elementary Math Methods James Becker
Mini-Lesson #1: Concept Introduction
1) Grade Level: 3rd Grade
2) Objective: Students will learn to determine the area of a rectangle using manipulatives
3) Performance Expectations:
3.1.E: Solve single- and multi-step word problems involving addition and subtraction of whole numbers and verify the solutions.
Lesson Information and Development:
4) Math Words:
Area, Sides, Four, Rectangle, Square, Length, Width, Right Angle, Parallel,
5) Concept Examples:
Using 1 inch square tiles the students will find the area of their favorite rectangle shaped book. Then small groups will use 1 foot tiles to find the area of their table’s rug. Finally the class will hypothesize the area of the entire classroom, and use a tape measure to test theories.
6) Concept Non-Examples:
Using the same techniques of aligning square tiles to find the area of a circle. The students use improperly sized tiles, such as 1inch tiles for the rug or 1 foot tiles for the book.
7) Our Turn:
The students will break into their small groups and use larger 1 foot tiles to collaboratively find the area of the rug under their table. Then they will explain the discussion and process.
The class will hypothesize what the area of their classroom is. After each group gives their rationale the teacher and a member from each group will use a tape measure to find the dimensions and convert the numbers into square feet.
8) Your Turn:
The students will individually pick their favorite book, and use 1 inch tiles to find the area of the book cover using traditional or inventive strategies. Then explain their process.