LESSON DESIGN Planning Template:

Title: Surface Area Right Triangular Prisms

Subject & Grade: Math 8

Topic: Math Makes Sense 8 4.4 Surface Area of a Right Triangular Prism

Designer(s): Devin Byrka

Big Ideas of the Lesson (Enduring understandings connected to PLOs)

Students will understand...

The nature of Surface Area of prisms and how a triangular prisms SA is similar and different to a rectangular prisms SA

Student Outcomes (Important skills, knowledge, or processes)

Students will be able to...

Unwrap a rectangular prism into its net form and calculate the surface area

Students will know...

How to calculate the area of a triangle

How to calculate the surface area of a triangular prism

Required Resources & Materials

Pencils and paper

PPT and videos

Stage

Timing

Teacher Activity

Student Activity

Mental Set

7 min

Where do we see triangular prisms in our everyday lives?

A Dirt Bike Jump is a triangular prism: http://www.youtube.com/watch?v=TGui7goeh8I

Triangular Light Prism Video: http://www.youtube.com/watch?v=yvMnURU1T24

PPT: https://docs.google.com/present/edit?id=0AWCDv8UEk4PLZGQzNHd3NW5fMjVkeDh2NzVnOQ&hl=en&authkey=CIPPjP0E

Discuss the images in the powerpoint, and have students contribute more ideas.

Listen, contribute ideas as teacher asks any questions.

Sharing the Objective / Purpose

2 min

Triangular prisms can be seen in tents, rooftops of houses, and Toblerone boxes. Surface area of a new type of prism same principles apply.

Listen to stated objective.

Input/Information

10 min

Area of Triangle = B x H

Similar to rectangular prisms.

Rec prisms: 6 faces (2, 2, 2)

Tri prisms: 3 rectangle faces and 2 triangle faces.

Listen and ask questions.

Model / Demo

5 min

Worked examples.

1) Easy example with small numbers (a door stop works well)

2) Toblerone box unwrap it and calculate the surface area

3) Harder real-life example with skateboard ramp

Observe and ask questions. Take notes.

Check for Understanding

3 min

How is it different from a rectangle? Whats the area of a triangle formula?

Respond.

Practice:

Collaborative

Independent

40 min

Give practice questions from MMS Practice Book, section 4.4 #2, work with a partner, then field some answers.

Assign HW Questions:

Students work together in pairs or groups of 3, answering the practice questions.

Students who are finished early can work on their projects, or try brain teaser word problems from the side of the class.

T1: 4,5,6,7,8,12,13

T2: 9,10,11,15

T3: 14,16,17

Closure

5 min

Where will you see triangular prisms in your everyday life? Keep your eyes open for them.

Students give responses.

Math Quiz 4.4 Surface Area of a Right Triangular PrismName:

1. a) Draw the net (2 marks)

b) Calculate the Surface Area (4 marks). Show your work!