Lesson Plans - Grade 8 Math

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Extra Credit - due April 16 Study the 2 triangles carefully. Once you have located the problem area, explain using the Pythagorean Theorem and the Proportion Equation why this is NOT true. Be sure to label what you are doing and show all your calculations clearly. This is a three credit assignment, but the answers must be correct.

4-9-2001 
1. P355 various.....2. .................3. .................
4. .................5. .................6. .................

OBJECTIVE: Identify corresponding parts of similar polygons(9-5, Pp353ff)[1.3.5] ACTIVITIES: The primary purpose of this section is to demonstrate the use of the [proportion ] equation as it applies to plane figures - an examples might be scale modelling. Major emphasis will be on the PROPORTION EQUATION of a/b = c/d. This will include the short-cut variations. Students will work on the problems in the section. NOTES: HOMEWORK: P604 (9-5) all  Proportion Problem Solver
[Proportion Equation][Ratio and Proportion]

4-10-2001 
1. HW P604(9-5).....2. .................3. .................
4. .................5. .................6. .................

OBJECTIVE:Solve problems involving similar triangles(9-6, Pp356ff)[1.3.5] ACTIVITIES: This is a continuation of the above assignment - continue with text exercises. Emphasize the term INDIRECT MEASURMENT. NOTES: HOMEWORK: P605(9-6) all
[Indirect Measurement]

4-11-2001   
1. HW605 (9-6) all..2. .................3. .................
4. .................5. .................6. .................

OBJECTIVE: Solve problems involving scale drawings(9-7, Pp3599ff)[1.3.2] ACTIVITIES: Distribute progress report #12. Make a SCALE drawing of the "U" box - interpret as a fold-up. List your calculations. NOTES: Sketch and dimension on the board - Show the fold-up pattern - task is to fit it on a piece of 8-1/2x11 paper. HOMEWORK: Continue this assignment

4-12-2001 
1. ProgReport#12....2. HW U-Box fold....3. P382-3 5-32......
4. .................5. .................6. .................

OBJECTIVE: Express fractions as percents. Solve problems using the percent proportion. (10-1, Pp380ff)[1.1.4] ACTIVITIES: Model the percentage proportion equation model. Do in book examples for practice. Add generated speed drills as appropriate. NOTES: HOMEWORK: P606, 10-1, 13-30 Show the problem setup.  Percent Proportion Problem Solver

4-13-2001 
1. HW606(10-1)13-30.2. Problem of Week..3. Proportion Quiz..
4. .................5. .................6. .................

OBJECTIVE: Express decimals and fractions as percents. Express percents as fractions and decimals (10-2, Pp384ff) ACTIVITIES: Give a test on the use of proportions - scaling and problem solving with percentages. Today's lesson is a skill refresher on the procedures for changing from fractions to decimals to percents and back again. Possible review work on page 387. NOTES: HOMEWORK: P607 10-2 colums 4 and 5 - be sure to show the process.
[ Decimal to fraction Interactive ][Fraction to decimal Interactive]
[Fractions to Percents] [Percents to Fractions]
[Decimals to Percents] [Percent to a Decimal]

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Problem Of the Week - Due 4-13-2001

ISSC-8-95

Inspector sharp has a case to investigate. A shot has been fired through the wall of a local restaurant. The shot entered the 4-inch-thick wall at a point two feet above the ground and exited at a point 1 foot 9inches above the floor. There are three suspects: a tall woman who was standing 3 feet away from the wall, an average-sized man who was standing 5 feet away, and another average sized man standing 7 feet away. If Sharp only has time to question one witness, and he believes the shot was fired from chest level, which witness do you think would be best to question? Justify your answer with numbers, words and a diagram.