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## Lesson Plan

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This lesson provided by:
 Author: Valerie Harden System: Mobile County School: Dixon Elementary School

General Lesson Information
 Lesson Plan ID: 26362 Title: Share and Share Alike (Equal Parts) Overview/Annotation: This Five E’s AMSTI lesson plan equips students to divide an object into equal parts. A story and interactive whiteboard activity about sharing food demonstrate the idea of equal halves of circles, after which students attempt to half squares and rectangles, and explain their findings to the group.  Finally, children divide paper and electronic pizzas into 3 and 4 equal parts.This lesson plan was created by exemplary Alabama Math Teachers through the AMSTI project.

Associated Standards and Objectives
Content Standard(s):
 MA2015 (K) 18. Correctly name shapes regardless of their orientations or overall size. [K-G2] MA2015 (1) 21. Partition circles and rectangles into two and four equal shares; describe the shares using the words halves, fourths, and quarters; and use the phrases half of, fourth of, and quarter of. Describe the whole as two of, or four of the shares. Understand for these examples that decomposing into more equal shares creates smaller shares. [1-G3] MA2015 (2) 25. Partition a rectangle into rows and columns of same-size squares, and count to find the total number of them. [2-G2] MA2015 (2) 26. Partition circles and rectangles into two, three, or four equal shares; describe the shares using the words halves, thirds, half of, a third of, etc.; and describe the whole as two halves, three thirds, or four fourths. Recognize that equal shares of identical wholes need not have the same shape. [2-G3]

Local/National Standards:

2009 Mathematics ACOS Standards (Kindergarten):

#5  Recognize that a whole object can be divided into parts.

· Distinguishing parts of a whole as equal or not equal

#8  Identify two-dimensional (plane) shapes, including rectangle, square, circle, triangle, hexagon, trapezoid, and rhombus, and three-dimensional (solid) figures, including sphere, cone, and cylinder.

National Council of Teachers of Mathematics (NCTM) Principles and Standards for School Mathematics:

Process Standards:

Reasoning and Proof: Select and use various types of reasoning and methods of proof.

Communication:  Communicate their mathematical thinking coherently and clearly to peers, teachers, and others.

Primary Learning Objective(s):

The students will be able to distinguish between equal and unequal parts of shapes, and problem-solve to find ways to divide shapes equally.

Students will develop problem solving and collaboration skills as they work together to find ways to equally divide shapes.  They will communicate their reasoning and problem solving strategies. Students will review the names of the plane shapes.

Preparation Information
 Total Duration: 31 to 60 Minutes Materials and Resources: How Many Ways Can You Cut a Pie? By Jane Belk MoncureFive brown paper circles, divided (see “preparation”)5”  paper squares (3-4 per child)4” x 6” paper rectangles (4-5 per child)Eating Fractions by Bruce McMillanSmall (5”) paper plates (1-2 per child)pattern blocks (included in AMSTI kit)Observation Checklist (attached) Technology Resources Needed: Interactive whiteboardComputer with LCD projectorWeb accessStudent computer(s) with web access Background/Preparation: Make five brown paper circles (about 6”).  Draw thick lines to divide one of them into even halves and four into 2 uneven pieces. Leave one blank.If you do not already have the SMART notebook software installed, take 5 minutes to download and install the free SMART interactive viewer.  Click on the top “download” button, fill in the required information, then click Run.  Follow the directions in the pop-up window.

Procedures/Activities: