Lesson Plans - Grade 8 Math

2-22-2000
1. Problem/Week a...2. Problem/Week b...3. .................
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OBJECTIVE: Find the CIRCUMFERENCE of circles(7-8, Pp284ff) ACTIVITIES: Refer to results of mini-lab data analysis for the value of pi. Emphasize that pi is a)an irrational number b)a ratio. Re-emphasize the need to list formulas and substitute values into formulas and the use of equation procedures to manipulate formulas. Also add emphasis on appropriate units. Differentiate between DIAMETER and RADIUS. NOTES: Emphasize that circumference, like perimeter, is a LENGTH. HOMEWORK: P600 (7-8) multiples of 3 (3 - 6 - 9 - 12)

2-23-2000
1. HW P600(7-8)x3...2. Fraction Quiz....3. .................
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OBJECTIVE:[Distribute Progress Report #10] Divide Fraction (7-9, Pp288ff); Fraction operation review. ACTIVITIES: Quiz reviewing with fractions (equation format to reduce calculator dependence) Major emphasis on the fraction division algorithm: 'change the sign to times and use the reciprocal of the number after the division sign' NOTES: Stress the importance of demonstrating each appropriate step, e.g., CHANGE ALL NUMBERS TO FRACTIONS. Also, reiterate the procedures for equations and positive and negative number operations. HOMEWORK: P601 lesson 7-9 14/17/20/23

2-24-2000
1. ProgReport #10...2. HW P601(7-9)var..3. ComplexFractns...
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OBJECTIVE: Identify and solve complex fractions. Section review. ACTIVITIES: NOTES: Supplementary lesson. Study guide and review 294-296 evens. HOMEWORK: Pages 294-295 Study Guide and Review even numbers.

2-25-2000
1. HW294-296SG&R I..2. P294-296SG&R II..3. P294-296SG&R III.
4. Chap Test........5. .................6. .................

OBJECTIVE: Chapter test - teacher prepared. ACTIVITIES: Test. NOTES: Hw will be a research type activity. HOMEWORK: Find a way to define FAIR and UNFAIR games in a mathematical sense.

Problem of the week (check the scoring guide) The problem of the week is due next Monday. Students are to use diagrams, charts, and tables as needed. Explain the process used to solve the problem. Be neat.

I can see clearly now...

Imagine that you take an elevator to the top of a building that is 200 meters high. It's a clear day, and you can see all the way to the horizon--the horizontal line in the distance, created by the curvature of the earth, where the sky seems to meet the ground. How far do you think you would be able to see from the top of the building?

You can solve this problem algebraically, using the Pythagorean formula SIDE SQUARED PLUS SIDE SQUARED EQUALS HYPOTENUSE SQUARED. In the diagram the height (h) of the building (200 meters) plus the radius (r) of the earth (about 6380 Km) form the hypotenuse of a right triangle. The radius of the earth and the distance (d) you can see are the sides of the triangle. Find the distance that you can see from the top of the building by solving the equation for d. Use the formula to find more distances. Check the scoring guide to see that your solution and explanation is correct -
This is a two-credit assignment.