1. 7th Grade Math Lesson 4.3.2

2. ENTERING THE CLASSROOM
Class Leader calls class to ATTENTION
Class at ATTENTION in back of chairs, hand at sides
Take SEATS – Say: “Per Ardua Ad Astra”
Secure your gear—place backpack on back of chair!
Take out your notebook, and a pencil

3. THE CURRENT CLASSROOM “MODE”
Quiet Mode
Let others think too
Stand & Deliver
Open Discussion
Team Work

4. STANDARDS FOR QUIET WORK: Let others think too
I am listening to the teacher or speaker.
I am not talking.
I am taking notes or doing other silent work as directed.
I am paying complete attention to the teacher or speaker.

5. Starter: Notebook Entry #40 --Starter: If CDs are on sale, 6 for
$89, what is the unit
rate?

6. ENTRY #41 – Today’s Objectives
I can find perimeter using the Distributive Property.

7. THE CURRENT CLASSROOM “MODE”
Quiet Work
Stand & Deliver
Open Discussion
Table Team Work

8. Direct Instructions—Discussion Mode Copy the underlined--Entry #42
Like terms are two or more terms that have the same variable(s), with the corresponding variable(s) raised to the same power.

9. Direct Instructions—Discussion Mode
When several tiles are pushed together and form a more complicated figure, the area of the new figure is the sum of the areas of the individual pieces, and the perimeter is the sum of the lengths around the outside. Area and perimeter expressions can be simplified, or rewritten, by combining like terms.

10. (42) Find area and perimeter:

11. THE CURRENT CLASSROOM “MODE”
Quiet Work
Stand & Deliver
Open Discussion
Table Team Work

12. Team work—Entry #43
Using algebra tiles on your desk, make the shapes on the next slides.
Trace each shape and label the length of each side on your drawing. With your team, find and record the total perimeter and area for each shape.
If possible, write the perimeter in more than one way.

13. Team Work-43

14. Team Work-43

15. Team Work-43

16. Team Work x = 6 for all three shapes

17. X = 6 for all three shapes

18. Entry 43, cont.( x = 6 )

19. Build the shape below using algebra tiles.
Then, on graph paper, draw the shape when x is equal to each of the lengths below.
x = 5 units
x = 3 units
x = 2 units

20. 4(2x + 3)
Build this expression with algebra tiles. Then rewrite the expression a different way. (Remember that parentheses in an algebraic expression allow you to show that tiles are grouped together.)

21. You have been writing expressions in different ways to mean the same thing. These expressions depend on whether you see tiles grouped or whether you see separate tiles . These two expressions are equivalent based on a mathematical property called the Distributive Property.

22. Brain Break!

23. Entry 43
Use the Distributive Property to write an equivalent expression for 21x See if you can do it by visualizing tiles.

24. THE CURRENT CLASSROOM “MODE”
Quiet Work
Stand & Deliver
Open Discussion
Table Team Work

25. Stand and Deliver, Entry #44
Two groups of b + 6

26. Stand and Deliver
4 ( y – 5)

27. Five groups of (-x) + 2

28. 44
10 ( 2x + 4)

29. 7 ( 3x – 5)

30. 44
Four groups of x - 9

31. -4 (3x – 6)

32. THE CURRENT CLASSROOM “MODE”
Quiet Mode
Let others think too
Stand & Deliver
Open Discussion
Team Work

33. Planner: Homework Quiet Mode
Entry # 45 Homework: Problems 4-98 and 4-99

34. END OF CLASS Quiet Mode: Let Others Think Too
Planner check by class leader (homework must be recorded for each class period today)
SECURE YOUR GEAR
Class, ATTENTION
Dismissal by group