Students will be able to identify, define, and describe a point, a line, and a line segment.
Introduction (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.
Explicit Instruction/Teacher Modeling (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.
Guided Practice/Interactive Modeling (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.
Independent Working Time (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.
Assessment (5 minutes)
- On the board, mislabel a ray, a line, and line segment. Have your students correct the errors.
Review and Closing (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.