March 9, 2016
by Nekeisha Hall

Lesson plan

Geometric Ideas

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Students will be able to identify, define, and describe a point, a line, and a line segment.

(10 minutes)
  • Prior to the lesson, cut out lines, line segments, and rays from colored construction paper.
  • Without identifying the diagrams by name, tell the similarities and differences between the diagrams.
  • Then, identify each diagram by name.
  • Tell your students that a ray has a point on one end, a line has no end points, and a line segment has two end points.
(15 minutes)
  • Ask your students where they might see examples of these objects in real life. For example, they might see the beam from a flashlight, one end of a ruler to another, a wheel, etc.
  • Show your students the different kinds of lines, such as horizontal, vertical, diagonal, and zigzag.
  • Have students tell the similarities and differences between these types of lines.
(20 minutes)
  • Tell students to draw examples of each type of line in their notebooks and label them.
  • In groups, allow students to get additional practice making these lines, line segments, and rays with different types of sticks.
(10 minutes)
  • Have students complete the Geometry worksheet. Encourage them to draw out the items for assistance.
  • Enrichment: Ask students to complete Lines, Line Segments, and Rays worksheet.
  • Support: Give your students string and sticks to practice making these designs.
(5 minutes)
  • On the board, mislabel a ray, a line, and line segment. Have your students correct the errors.
(5 minutes)
  • Encourage your students to combine the lines, rays, and line segments to make new shapes.
  • Walk around the room and check to make sure that your students are identifying the lines correctly.

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