How To Use A Protractor. Lesson Plan for 7th Grade Students

Topic: How to use a protractor

Objectives & Outcomes

To be able to use a protractor to measure and draw angles bigger than 5 degrees but smaller than 345 degrees.

Materials

Protracer

Paper

Pencil

Warm-up

Ask students if they have ever used a protractor before.

Ask them to describe how to use a protractor.

Direct Instruction

Show students a protractor and explain that it is used to measure angles.

Explain that an angle is the figure formed by two lines that meet at a point.

Point out the lines and the point on the protractor.

Explain that the protractor is divided into degrees, with 0 degrees at the top and 360 degrees at the bottom.

Show students how to place the protractor on a piece of paper, with the 0 degree mark aligned with the top of the page.

Demonstrate how to use the inner and outer edges of the protractor to measure an angle, starting at the 0 degree mark and rotating clockwise.

Show students how to use the scale on the protractor to determine the angle measure in degrees.

Guided Practice

Have students work in pairs to practice measuring angles with their protractors.

Give students a few different angled objects (such as coins or beads) and have them measure and record the angle measures in degrees.

Have students check their work with the help of a teacher or tutor.

Independent Practice

Have students use their protractors to measure and record the angles of several different objects (such as coins or beads).

Encourage students to measure and record the angles carefully and accurately.

Have students create a graph or table showing the relationship between the angle measure and the objects' shape or size.

Have students present their findings to the class.

Closure

Review the main points of the lesson, including how to use a protractor to measure angles and how to calculate the degrees from the measured angle measure.

Ask students to share one thing they learned or found interesting during the lesson.

Assessment

Assess students' ability to measure angles with a protractor and calculate degrees by measuring and calculating in pairs.

Use the independent practice activity as a formative assessment to check for understanding.

Give a quiz at a later date to assess students' retention of the material covered in the lesson.

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