Lesson Plan

Geometry-Parts of a Whole

Reasoning with 3D shapes and their attributes
Lora P.
Classroom teacher
Altizer Elementary School
Huntington, WV
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My Grades 2
My Subjects English Language Arts, Math, Science, Social Studies

Students will be able to 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, four fourths. Recognize that equal shares of identical wholes need not have the same shape...CCSS.Math.Content.2.G.A.3.

Grades 2
All Notes
Teacher Notes
Student Notes

1 Hook

This attention-capturing presentation will build on the student's previous knowledge of plane and 3-D shapes and introduce the basic parts of a whole, examine equivalent fractional parts and mixed numbers. The presentation will consist of 3 short informational video presentations of fractions under the math subject area which motivate the student to engage and learn more independently. Students can engage in the easy or hard quiz provided at the end of the videos.

2 Direct Instruction

After students interests levels are peaked following the informational videos on BrainPop, Jr. the students are engaged through direct instructional methods presented on the smart board by the teacher using National Library of Math Manipulatives (section: Fraction parts of a whole and visualizing) and dividing specific shapes into equal shares, halves, thirds, fourths, or other portions. The teacher informally assesses students in a whole group session with concepts clearly outlined and modeled with concrete examples to provide desired outcomes.

3 Guided Practice

Students will be given extensive opportunity to explore, create, and replicate all parts of a whole concepts presented using the icons in the fraction section. Using the fraction bars icon, students will learn about fractions using fraction bars, the fractions - naming icon to write the fraction corresponding to the highlighted portion of a shape, and the parts of a whole icon to relate parts of a whole unit to written description and fraction. Students will also use the visualizing fractions icon to illustrate a fraction by dividing a shape and highlighting the appropriate parts. Students receive immediate feedback for correct responses and clarification is given.

4 Independent Practice

Free to Try, Paid

Students are given ample skill and drill activities to master objectives that were presented using the U section. U.1 Equal parts U.2 Halves, thirds, and fourths U.3 Identify the fraction U.4 Which shape illustrates the fraction U.5 Parts of a group U.6 Fraction word problems U.7 Compare fractions U.8 Order fractions with like numerators U.9 Fraction models equivalent to whole numbers U.10 Fractions equivalent to whole Assessments can be used as formative or summative to record performance.

5 Wrap-Up


Students will work in small groups using an ipad to create movies they will present to the class on what they learned about equal shares, how to name them, halves, thirds, fourths, and so forth and that equal shares of identical wholes need not have the same shape as the "parent" shape. Students will provide concrete and virtual examples using class materials, demonstrations, and technology. Extension activities can be incorporated in your student newsletter for parents and students to engage in encouraging hands-on activities at home and homework assignments can also be given in ixl.