Lesson Plan # 20 - Review
Note: today's lesson is long, so you may want to eliminate the mental math
and the lesson review, since all this lesson is review.
- (5 min) Mental Math
- Start with 55, add 8, then divide by 7 [9]
- What is 60% of 80? [48]
- What is 50 times 200? [10,000]
- What is 8000 times 20? [160,000]
- What is 30% of 50? [15]
- (5 min) Review of homework #19 (<= 3 problems)
- (15 min) Review course concepts:
- Discuss area and perimeter. Have students find the area
of these shapes (and the perimeter of the first):
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A = 402 cm2
P = 98 cm |
A = 60 mi2 |
- Pass out the "Math Concepts Review" handout and discuss triangle
types.
- Discuss angle rules using the handout. If you have time, use the
following examples:
- Draw this number line on the board:
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
-8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8
Ask the students:
What is - 5 + 8? [+ 3] |
What is - 4 - 3? [- 7] |
What is 5 - 8? [ - 3] |
- Use the handout to discuss multiplying and dividing signed numbers.
Use these examples:
- 6 x - 5 = ? [ + 30] |
- 6 x + 5 = ? [ - 30] |
- ( - 5) = ? [ + 5] |
+ ( - 5) = ? [ - 5] |
- Discuss expression evaluation.
Use these examples for a = 3, b = 2, c = 9:
abc [= 54] |
bc/a [ = 6] |
b ( a - c) [ = -18] |
- Discuss equation solution using these examples:
3x - 5 = 22 [x = 9] |
x/8 = 8 [x = 64] |
x2 - 5 = 76 [x = 9] |
- Discuss word phrases using the handout. If you have time, have
them solve this problem:
If I take three times my age and subtract 18 I get 21. How old am I?
[13 years old]
- Discuss mean, mode median and range using only the examples in the
handout.
- Discuss probability using the handout examples.
- Discuss the circumference and area of a circle using the
handout.
If time permits, have them find the area and perimeter of this half
circle:
[A = 38.465, P = 24.99 mi]
- (Remainder of class) In-class Exercise.
- Hand out homework as students successfully complete the in-class
exercise.
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