Putting Manipulatives to Work, Part 2: Developing Geometric Measurement in Grades 3–4 with Color Tiles & AngLegs

Putting Manipulatives to Work is a three-part series of webinars designed to take advantage of manipulatives that are likely to be available in schools and in classrooms. Each session discusses several manipulatives that can be used to support a common topic: number sense (Part 1), geometric measurement (Part 2), and algebraic expressions/equations (Part 3).

The series came about from the questions of educators in the field regarding unused manipulatives they have accumulated in their classrooms. They could have been left behind by another teacher or part of a new program, but the common theme is that these materials are available and should be used. Teachers often aren’t sure how to use them. This series highlights a mix of manipulatives–some old friends like Cuisenaire® Rods, around for more than 80 years, and others newer to our classroom like Rekenreks. This webinar answers the question, how can we best use these manipulatives to enhance instruction?

What is Geometric Measurement?

Geometric measurement is the study of measurement tied to particular geometric ideas. For example, the study of area and perimeter or volume and surface area are examples of measurement associated with the properties of various two- and three-dimensional shapes. Geometric measurement provides important context for understanding operations and for problem-solving.

Color Tiles

Traditional Area Problem using color tiles; Area = Length x Width Color Tiles are a collection of square tiles, one inch per side, in four colors – red, blue, yellow, and green. Color Tiles are often used to model area and perimeter. Three different problem-solving tasks are presented in the webinar – Color Tiles can be used to model each.



Angle Relationship in Polygons using AngLegs AngLegs enable students to study polygons, perimeter, area, angle measurement, side lengths, and more. The set includes 72 snap-together AngLegs pieces (12 each of six different lengths) and two snap-on View Thru® protractors. The webinar demonstrates the use of AngLegs to create and measure angles as well as to construct and examine the properties of various polygons.

About the Presenter

Image: Dr. Sara Delano Moore

Sara Delano Moore, Ph.D., Director of Mathematics and Science, hand2mind

Sara Delano Moore is the Director of Mathematics and Science at hand2mind. Dr. Moore earned her Ph.D. from the University of Virginia in Charlottesville, and also holds degrees from the University of Oxford (United Kingdom) and The Johns Hopkins University. She has taught mathematics and science in both public and private schools, and has served as Program Faculty Chair of the Middle Grades Teacher Education Program at the University of Kentucky. Dr. Moore’s writing can be found in national journals such as Mathematics Teaching in the Middle School, Science Scope, and Middle School Journal.

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Webinar Information

Topic: Geometry
Grades: 3 to 4
Recording Date: 7/2/2015
Length: 53:03
Supporting Documents:

  • Presentation Slides
  • CE Quiz
  • Chat Log

Manipulatives Used in the Webinar


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