This short video and interactive assessment activity is designed to give fourth graders an overview of triangle classifications.

This short video and interactive assessment activity is designed to teach fourth graders about counting the angles in a closed figure.

In this online interactive, students determine if angles are acute, obtuse, right, or straight.

This short video and interactive assessment activity is designed to teach third graders about determining unknown angles in parallelograms.

This short video and interactive assessment activity is designed to teach fourth graders about determining unknown angles in trapezoids.

This short video and interactive assessment activity is designed to teach third graders about determining unknown angles in trapezoids.

This short video and interactive assessment activity is designed to give fourth graders an overview of special triangles.

This short video and interactive assessment activity is designed to teach third graders about determining the unknown angle in an isosceles triangle.

Students will apply math concepts related to measuring angles to diagram the Earth’s rotation throughout a 24-hour period. This task allows for multiple entry points in that students can either use their knowledge of angle measures (e.g., the Earth would rotate 180° by noon) or knowledge of fractions (e.g., 1/2 of a complete rotation would occur by noon) to begin grappling with the task. By creating diagrams, students will also develop an understanding of using tools to measure angles, as well as apply the concept that angle measures are additive (e.g., I figured out that the Earth rotates 15° each hour. Therefore, I realize that the earth rotates 45° in three hours). This lesson was developed by NCDPI as part of the Academically and/or Intellectually Gifted Instructional Resources Project. This lesson plan has been vetted at the state level for standards alignment, AIG focus, and content accuracy.

CK-12's Elementary Math Grade 3 is a series of videos and interactive videos designed to teach basic math concepts to 3rd graders. Concepts covered include Addition and Subtraction, Multiplication, Division, Place Value, Decimals, Time, Factors and Multiples, Money, Measurement, and Geometry.

In this lesson, students estimate the size of multiple angles from a constructed image without using a protractor.

This 4 unit of geometry lessons explores circles and angles through 5 hands-on activities and 6 worksheets.

In this lesson, students will use varied protractors to distinguish angle measure from length measurement.

In this lesson, students will measure and draw angles. Sketch given angle measures and verify with a protractor.

In this lesson, students will identify and measure angles as turns and recognize them in various contexts.

In this lesson, students will use the addition of adjacent angle measures to solve problems using a symbol for the unknown angle measure.

In this lesson, students will use the addition of adjacent angle measures to solve problems using a symbol for the unknown angle measure.