**Web-based Lesson Plan**

**Date:**26/12/2012

**Teacher:**

Wahid Yunianto

College student of Mathematics Ecucation Master Program, Sriwijaya University

**Class/Level:**Elementary students Grade 5

**Topic:**Geometry 3D shapes

**Objectives (Learning Goals):**

- Find things which have the same shape with a rectangular polyhedron
- Draw a net / nets of rectangular polyhedron (prism)
- Find the surface area of rectangular prism
- Students will see that the Internet is user-friendly in the process

**Web Sites used**

**Name of Web site:**Great Atlantic and Pacific Tea Co., American Stores Company

**Rationale for selecting this site:**It is an interactive Web site where students can learn about three-dimensional shapes, calculate surface area and volume, and discover some of the mathematical properties of shapes.

**Other materials:**

Variety of Boxes, paper, wrapping paper gift, rulers, scissors, cutters, and pencils.

**Teacher Preparation:**

Bookmark sites. Put addresses on the board as well. Optional- create worksheets to use while on -line and change scenario cards.

Steps for learners:

**Description of pre-computer/classroom activities (preparation):**

- Review through class discussion the 3D shapes (polyhedrons)around us how they look like. Discuss where those shapes are found and used.
- Go around the class and find 3D shapes you can find.
- Students list the same 3D shapes they find at home
- Use all the material, let them experience in wrapping a box gift and find the surface area of polyhedrons by using this activity.
- Go on-line to Interactives Geometry 3D shapes to practice.

**Description of computer/online activities:**

- See the tutorial here.
- At Interactives Geometry 3D shapes, students explore how to find a net of a rectangular polyhedron or other polyhedrons.
- At Interactives Geometry 3D shapes, students find the surface area, by filling the net with the area of each blanks and adds up those areas .
- At Interactives Geometry 3D shapes, students try other prisms and find their surface area.

**Description of follow up activities:**

**Take home:**

- Students use activity of wrapping a box gift to make a connection to wrapping a tube.
- Students are challenged to find surface area of a tube or cylinder.
- Students are challenged to use the surface area of other cylinders.

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