Free 1st Grade Triangles And Quadrilaterals Lesson Plan (Math)

Topic: Identifying the difference between quadrilaterals and triangles

Objectives & Outcomes

• Students will be able to identify and name quadrilaterals and triangles.
• Students will be able to draw and label examples of both types of polygons.

Materials

• Construction paper
• Scissors
• Glue
• Markers or crayons

Warm-up

• Ask students to raise their hand if they know what a polygon is.
• Ask students to name some polygon types that they know, such as triangle, square, and rectangle.
• Show students a picture of a polygon and ask them to identify what type it is (e.g. is it a square or a rectangle).
• Encourage students to explain their reasoning for their answers.

Direct Instruction

• Review the names of the different types of polygons (triangle, square, rectangle, pentagon, hexagon, etc.).
• Show students pictures of different types of polygons and have them identify which one is which.
• Explain the differences between quadrilaterals and triangles.
• Quadrilaterals are any four-sided polygon, while triangles have three sides.
• Quadrilaterals can be further divided into rectangles, squares, and trapezoids, which all have different characteristics.
• Triangles have three sides and three angles, while quadrilaterals can have any number of sides and any number of angles.

Guided Practice

• Have students work in pairs or small groups and give each group a set of pictures of polygons.
• Have them identify which ones are quadrilaterals and which ones are triangles.
• Have them explain their reasoning and have a discussion as a class about any differences or similarities they may have noticed.
• As a follow up, have students work in pairs or small groups and give each group a set of geometric shapes (cubes, cylinders, etc.).
• Have them identify which ones are quadrilaterals and which ones are triangles.
• Have them explain their reasoning and have a discussion as a class about any differences or similarities they may have noticed.

Independent Practice

• Have students work individually or in small groups to create a classroom poster or presentation on the different characteristics of quadrilaterals and triangles.
• Students can use their prior knowledge and the information they have learned in the lesson to list and explain the characteristics that define a quadrilateral or a triangle.
• encourage students to be creative and use visual aids (such as pictures or drawings) to enhance their presentation.

Closure

• Review the key points of the lesson with the students.
• Ask students to share one thing they learned about quadrilaterals and triangles today.

Assessment

• Observe students during the independent practice to assess their understanding of the concept.
• Collect and review the student-created quadrilaterals and triangles to assess their ability to accurately identify and differentiate between the two.