This lesson is a task in the Geometry strand that can be used for students discovering what makes a correct polygon and what does not.  This lesson can be extended to upper primary students to include classifying types of triangles.https://goopenva.org/courses/1-g-all-vs-only-some

This resource is a series of Google Slides that asks if two attributes of quadrilaterals and triangles can exist together 'Never, Sometimes, or Always.' After posing the question, the following slide will show the an and possible examples of the given polygons.

Classifying, sorting, and describing triangles  Mathematics Instructional Plans (MIPs) help teachers align instruction with the Mathematics Standards of Learning (SOL) by providing examples of how the knowledge, skills and processes found in the SOL and curriculum framework can be presented to students in the classroom.

This is a slide presentation for a complete lesson on a Python program using turtle. Lesson plan and example Python program are attached.