Teacher Name:
Subject: Math
Mary O’Sullivan Date: Sept 8, 2011
Lesson Topic/Unit of Study: Squares & Square Roots
Grade Level(s): 7 Time Required: 42 minutes
Standards to be Addressed:
7.N.15 Recognize and state the value of the square root of a perfect square (up to 225)
R
EQUIRED
M
ATERIALS
:
Class Minutes Required:
_____ Learning Objective: SWBAT
explore square roots and classify them as rational or irrational.
_____Class Opener/Warm-Up: see ppp slide 2
_____ Direct Instruction: (10-2 Principle) See power point presentation
_____ Student Practice/Application: see attached sheet
_____ Summary/Closure: see attached lesson plan
_____ Formative Assessment (based on objective): thumbs up, thumbs down
_____ Homework: see attached sheet
Adaptations: individual instruction on how to use the calculator
Extensions: find 10 irrational numbers, find 10 rational numbers
Technology Integration: power point & white board

Topic: Squares and Square Roots
Objectives: Students will explore square roots and classify them as rational or irrational.
Standards:
7.N.2 Recognize the difference between rational and irrational numbers
7.N.16 Determine the square root of non-perfect squares using a calculator
Do Now:
Slide two
Lesson: Classifying square roots as rational or irrational
Closure
Students are able to tell the difference between an irrational square root and a rational square root.
Homework
Attached sheet.

Name_______________________ __Date_____________ Period_____________
A. Find the value of each. If the number is irrational, then write “irrational”
1) 7056
2) 20 .
25
6)
7)
2500
549 .
2
3) 1250
4) 41 .
87
8) 3844
9) 7 .
84
5) 1521
B. Find the value of n:
11) n 2 = 529
10) 500
12) n 2 = 16.81 13) n = 42 14) n = 11.4
E. Find the value of each. If the number is irrational, then write “irrational”
1) 2025 2) 68 .
89 3) 957
4) 51 .
6 5) 1444 6) .
0625
7)
1
16
8)
9
25
9)
4
9
F. Which numbers were NOT irrational in part E? __________________________

A. Find the value of each. If the number is irrational, then write “irrational”
1) 4672
2) 3249
6) 6 .
25
7)
549
3) 78 .
34 8) 27 .
5
B. Find the value of n:
9) n 2 = 361 10) n 2 = 42.25 11) n 2 = 14.44 12) n 2 = 841
Find the value of n:
13) n = 17 14) n = 4.5 15) n = 36 16) n = 1.2
Identify each number as “Rational” or Irrational”
14) 70 15)
2
3
16) 7.25
17) 8.39517335… 18) 121 19)
1
4
5
20) 2.888

8 21)
25
22) 15
Find the value of n:
23) n 2 = 225 24) n 2 = 196
25) n = 9 26) n = 13