Surface Area of a Cube

LC: Finding the surface area of a cube.

I. Learning Objectives: After the activity, pupils shall be able to:
C: discover surface area formula of a cube.
P: solve for the surface area of a cube.
A: follow instructions properly.

II. Learning Content:
Topic: Surface Area of a Cube
Concept: SA = 6 faces x area of each square
SA = 6s2
Values: following instructions properly
Materials: oslo paper, masking tape, scissor,
Resources: Apistar, E. (2005), Soaring 21st Century
Torres, H. (2009) Number Smart
http://www.education.com/activity/fourth-grade/page7/

III. Learning Experience:
Classroom Routine - checking of attendance, ID, etc.
A. Introduction:
1. Preview:
a. Motivation: Game Ka Na Ba? ( group of 4 )
I have two flat surfaces.
0 edges and 0 vertices
Which space figure am I?

I have 5 faces and 5 vertices.
How many edges do I have?
Which space figure am I?

I have 6 faces and 12 edges
I am not a rectangular prism
Which space figure am I?

I have a flat surface and curved surface.
Which space figure am I?

b. Presentation of the day’s lessons.

B. Interaction:
Cooperative Learning:

What you will do:
1. Draw the figure below in an oslo paper.
(show the flat figures of a cube with 10cm each side)
2. Be sure to copy the correct measurement.
3. Cut the figure.
4. Form a three-dimensional figure by putting masking tape on each edges.
(they should form a cube)

· What shape did you form?
· How many edges/sides are there in a cube?
· How many faces are there in a cube?
· How do we get the area of each face?
· What is the total area of all the faces?
· How do we get the surface area of a cube?

C. Integration:
1. Generalization:
· What is the formula in finding the surface area of a cube?
2. Valuing:
- How important is following instructions?
3. Action:
Explain in your own words on how you get the formula SA=6s2.

IV. Evaluation:
Rubrics:
Teamwork: 5 pts.
Getting the correct answer 15 pts.

V. Assignment: Find the surface area of each cube with the given side.
1. 12mm
2. 110cm
3. 1.5 ft