Clarifications
Clarification 1: Instruction includes exploring figures in a variety of sizes and orientations.Clarification 2: Instruction focuses on using informal language to describe relative positions and the similarities or differences between figures when comparing and sorting.
Benchmark Instructional Guide
Connecting Benchmarks/Horizontal Alignment
Terms from the K-12 Glossary
- Cones
- Cubes
- Cylinders
- Spheres
Vertical Alignment
Previous Benchmarks
Next Benchmarks
Purpose and Instructional Strategies
The purpose of this benchmark is for students to build on their understanding of classification of three-dimensional figures by finding similarities and differences between shapes.- Instruction focuses on sorting and classifying three-dimensional figures.
- Instruction includes opportunities for students to sort figures based on various criteria, such as same number of faces and figures with all flat sides (MTR.5.1).
- Instruction includes figures of various sizes and orientations, and may include nonstandard versions of figures as well (MTR.2.1).
- Relative position refers to students identifying left/right, in front of/behind, apart and above/below when comparing shapes.
Common Misconceptions or Errors
- Students may sort figures separately because of orientation and size rather than the identified attributes of the figures.
- Students may inaccurately name and sort three-dimensional figures based on the names of their two-dimensional faces.
Strategies to Support Tiered Instruction
- Teacher provides solid shapes (cones, cylinders, cubes, and spheres) for students to sort.
- For example, instruction includes sorting shapes by how they are same or by how they are different. The teacher asks follow up questions such as, “How did you decide to sort the shapes? How many sides does this group have?”
- Teacher provides the following solid figures in multiple sizes: cubes, cylinders, cones, spheres. Shapes are scattered in the workspace. Students work to match the cubes with the cubes, the cylinders with the cylinders, etc., until all shapes are grouped. The focus is on students being able to identify shapes when they are oriented differently (i.e., not sitting flat on one side).
- Teacher constructs a Mystery Box where they position one solid figure out of sight of students. Display some shapes on top of the box. Students put a single hand into the box to feel the shape and then point to the matching shapes on display. To begin, let the student see the shapes when feeling the attributes. Then hide the shape on subsequent turns.
Instructional Tasks
Instructional Task 1 (MTR.2.1, MTR.4.1)
Using the figures below, create sorting cards for students. Provide each student in a group with their own set of figures to sort. Ask each student to sort the figures in any way they choose. Once students have sorted their figures, give each student time to share about their choices, and explain how they sorted their figures (by shape, straight sides and circles, filled and not filled or number of faces). Once students have shared, ask them to sort their figures in a new way. Give time for sorting and sharing again. Repeat the task as needed.
Instructional Items
Instructional Item 1
In what ways are the figures similar? In what ways are they different? Circle the cone. Draw a square around the cylinder.*The strategies, tasks and items included in the B1G-M are examples and should not be considered comprehensive
Related Courses
Related Access Points
Related Resources
Formative Assessment
Lesson Plans
STEM Lessons - Model Eliciting Activity
Students will help Mr. Bob Fitness choose a piece of sports equipment for his new store. Students will work with three-dimensional shapes and determine a procedure in choosing the equipment.
Model Eliciting Activities, MEAs, are open-ended, interdisciplinary problem-solving activities that are meant to reveal students’ thinking about the concepts embedded in realistic situations. MEAs resemble engineering problems and encourage students to create solutions in the form of mathematical and scientific models. Students work in teams to apply their knowledge of science and mathematics to solve an open-ended problem, while considering constraints and tradeoffs. Students integrate their ELA skills into MEAs as they are asked to clearly document their thought process. MEAs follow a problem-based, student centered approach to learning, where students are encouraged to grapple with the problem while the teacher acts as a facilitator. To learn more about MEA’s visit: https://www.cpalms.org/cpalms/mea.aspx