Brad ColemanSpring 2014Math – GeometryPerimeter Day 1

Learning Goal My learning goal is to present a math lesson in a timely manner that is

interesting and understandable to the students My learning goal is to maintain acceptable classroom management

throughout the lesson, including an activity that takes us out of the classroom

Rationale I am teaching this lesson to introduce the topic of perimeter This lesson is important because the unit continues with more perimeter and

area, the latter of which can be difficult to understand without understanding perimeter

This lesson fits into the big picture as part of the geometry unit

Source The guidelines for this lesson come from Envision Math. I have collaborated

with Liz for ideas and used my own ideas to make it my own

Objective Students will use shapes to find basic perimeter and begin to understand the

formula of adding the sides Students will notice they can find missing sides from given information

Standards 3.MD.D.8 – Solve real world and mathematical problems involving

perimeters of polygons, including finding the perimeter given the side lengths, finding an unknown side length, and exhibiting rectangles with the same perimeter and different areas or with the same area and different perimeters

Materials QOD on whiteboard “Finding Perimeter” in class worksheet HL 94 homework Perimeter activity

o Recording sheeto Masking tape

ProcedureIntroduction

QOD: I need to put a fence around my yard. How can I find out how much fence I need?

o Discuss answers – measure around the yard Introduce perimeter

o The distance around a figure

Lesson Development Draw example figure on white board

o Label each side in inches Show the perimeter (sides)

o How can we find the perimeter? Add side lengths Mark off sides as counted Remember unit

Pass out in class worksheeto Complete as a class for understanding of perimeter concepts

Perimeter activityo Students will work in partnerso 5 stations set up in the hall

Tape forming shapes 1 tile = 1 ft

o Find the perimeter at each station and record it on handouto Review hallway behavior

Teacher observes and helps groups in hallway during activity When groups are finished, they may work on “Understanding Perimeter”

Differentiation Teacher will help struggling groups during activity

o It is okay for struggling groups to go at needed pace

Conclusion What are some ways we can use perimeter in real life? Envision video time permitting

Assessment In class activity Homework HL 94

Name: _____________________________________

Finding Perimeter

1.

Find the perimeter.

_________________________________________

2.

Find the perimeter.

_______________________________________

3.

Find the perimeter.

______________________________________

4.

Each square has a side length of 1 foot. Find the perimeter.

_______________________________

5.

Find the perimeter.

_______________________________________

6.

The perimeter is 15 inches. Find the length of side X.

___________________________________________

Name: _____________________________________

Find the Perimeter Activity

1 Tile = 1 Foot

Station 1:

Perimeter: ______________________________

Station 2:

Perimeter: ______________________________

Station 3:

Perimeter: ______________________________

Station 4:

Perimeter: ______________________________

Station 5:

Perimeter: ______________________________

QOD

Johnny’s new puppy won’t stay in the yard and keeps running away! Johnny needs to build a

fence. How can Johnny find out how much fence he needs to put

around his yard?