Before you have access to this lesson from the links below, click on “**Materials**” to see what’s covered. The exercise is expected to last for not more than 1 hour 3o minutes, and please, be ready to complete this lesson in **ONE** session. If you haven’t signed up for the IXL SKILLS package, the temporal login info that you purchase from the link below, will be valid for 48 hours.

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Warmup: The surface area of a cube is related to the side lengths. Find out how they are related in this exercise. The original cube has side lengths 1 unit, follow the instructions below and complete the table that follows.

- Move the slider through
**a = 0.5, a = 1, a = 2, a = 3.** - Observe the net of the cube as you move through the different values.

Find the surface area when the value of a is

(1.) 0.5

(2.) 1

(3.) 2

(4.) 3

(5.) What value of a gives the greatest surface area of the box?

(6.) Did you expect the surface area of the box to be halved when the value of a is halved? Why or why not?

**Activity #1** (30 minutes)

1. Topic: Surface area of cubes, prisms, and pyramids(Applet).

2. Explainer Video: Surface area of cubes, prisms, and pyramids.

**Practice Exercise** (30 minutes).

Topic: Surface area of cubes, prisms, and pyramids.

**Quiz Time** – (Two sets: 30 minutes).

Topic: Surface area of cubes, prisms, and pyramids (to be taken while you are logged in).

- An applet.
- An explainer video on "Surface area of cubes, prisms, and pyramids".
- A skills exercise from the IXL website on "Surface area of cubes, prisms, and pyramids". The questions exhibit an increasing order of difficulty.
- Two sets of quizzes on "Surface area of cubes, prisms, and pyramids". The questions exhibit an increasing order of difficulty, and an average score of 80% expected.

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