`Logic                               M. Elaine Granger              Irvin C. Mollison                               4415 S. Dr. Martin Luther King Jr. Drive                               Chicago, Illinois 60616                                 312-285-3289Objective:The sixth through eighth grade students will be able to:1) Understand word problems by use of reasoning techniques2) Identify the validity or non-validity of the problems3) Discern which factors are needed for problem resolution4) Use deduction strategies for problem resolutionMaterials:All materials listed are for an entire classOverhead projectorworksheets and chartscoins (pennies & dimes)box of toothpicksplastic shapes (triangle, rectangle, parallelogram, & square)forty buttonsa medium size boxStrategies:1 a. Work in teams of three to four students     Distribute the plastic shapes     Explain to the students that there is a set time limit     Arrange shapes into required pattern(s)     Work cooperatively in teams  b. Work individually to solve another pattern puzzle  c. Have 6 to 12 students work independently while others are working in      teams to solve another pattern puzzle 2. Define the word logic  3. Illustrate a logical sequence4. Illustrate an illogical sequence5 a. Discuss how logic can be used in daily lifestyles  b. Discuss how logic can be used to solve word problems6 a. Distribute 12 toothpicks to each student     Place toothpicks into geometric shapes drawn on the chalkboard     Remove the required number of toothpicks to form new shapes  b. Ask students to explain what they did     Organize the steps taken into a logical process7. Have students preview the handout sheets   Ask students what they think they will need to do   Discuss ways to solve similar problems   Have students find the solutions   Work individually and in teams (as time permits)8. Distribute the coins to each set of teams   Review problem with students   Have students find the solutions   Explore and discuss whether more than one solution is possible9. As a follow up to this lesson have students make up word problems   Exchange problems and work in teams for solutionsConclusion:Students should feel more comfortable with establishing a process for solving word problems.  Teachers should solicit and generate all kinds of questioning about the use of reasoning, elimination, and deduction to solve word problems.  The overall process should be both informative and enjoyable. `