Clark Creative Education
o Whodunnit? Add & Subtract Rational Expressions Ideal Unit: Rational Functions Time Range: 20-40 Minutes Supplies: Pencil & Paper Common Core Alignment: This particular activity was mapped to these common core standards. Whodunnit activities are ideal as a small group skill practice. A-APR.7 (+) Understand that rational expressions form a system analogous to the rational numbers, closed under addition, subtraction, multiplication, and division by a nonzero rational expression; add, subtract, multiply, and divide rational expressions. General Procedures: A.) Give students a Whodunnit Worksheet. Students will need to solve the 10 problems about the topic. Each correct answer will result in a clue. Students will check off the Players, Last Known Whereabouts locations and Methods that are accounted for. The one remaining from each column is the correct solution. In this case it should be: Professor Delta used a venomous bite in the gym. B.) Print out the Clues and cut them out. I suggest you laminate them for future use. Spread them in different locations in the classroom and turn the students loose. Have teams of 2-3 circulate and attempt to figure out the clues. Once they think they have all the pieces they can come to you to check their answer. If they are wrong, let them figure it out An alternative Clue 10 is provided in the event you want a different result for different class periods. Clark Creative Education
Whodunnit? Name: Six contestants on a reality TV show were stunned to find their lowest scoring colleague was murdered. They must figure out the crime before the bell rings. The question is Whodunnit? And how The Player, Last Known Whereabouts and Method that are left unaccounted for -- is the solution. 1. 2. 3. 4. 5. 6. Clark Creative Education
7. 8. 9. 10. Who is the Killer? (The three boxes left unchecked will reveal the crime. If you cannot figure out, you may be next) The Players The Last Known Whereabouts The Method Dr. Alpha Atrium Chemical Poisoning Miss Beta Gym Drowning Mrs. Gamma Kitchen Electrocution Professor Delta Library Fallen Object Mr. Epsilon Movie Theater Mauled by a Cougar Coach Omega Pool Venomous Bite Clark Creative Education
??? Clue #1 2x + 1 3x + 1 2x 3x 0 Coach Omega was eating in the theater. 2 3 2 3x 3x The victim was not drowned. The victim was not poisoned by chemicals. Mrs. Gamma was in the kitchen making a tuna sandwich. Clue #2 3x + 7 4x 15 8x 1 8x 6x 1 4x 6x 1 8 6x 1 8x The victim was not mauled by a cougar. The victim did not have a venomous bite. Mrs. Gamma drinking tea in the atrium. Miss Beta was diluting juice in the kitchen.??? Clark Creative Education
??? Clue #3 x 4 x + 1 5 x x! 9x + 5 x! + x x! 9x 5 1 + x x! 9x 5 x! + x x! 9x 5 1 The murder did not involve chemicals. Mr. Epsilon was watering the plants in the atrium. The victim was not mauled by a cougar. Mrs. Gamma was playing ball in the gym. Clue #4 2x! 2 x! 1 2x! + 2x + 2 x! 1 2x! + 2x 2 x! + 1 2x! + 2x 2 x! 1 2 + x x + 1 + x x 1 Miss Beta was feeding the cat in the atrium. Professor Delta was relaxing by the pool. The victim was not poisoned by chemicals. The victim was not electrocuted.??? Clark Creative Education
??? Clue #5 8x! + 6x! + 7x 3 4x! + 6x! 8x! + 6x! 3 4x! + 6x! 8x! + 6x! + 7x 3 4x! + 6 3x 1 2x! + 4x 2x + 3 Mr. Epsilon was frowning in the movie theater. The victim did not have a venomous bite. Coach Omega was baking a cake in the kitchen. 8x! + 6x! + 7x 3 4 + 6x! The victim was not mauled by a cougar. Clue #6 x! + 2x! + 40x 1 x! + 13x! + 13 x! + 2x! + 40x 1 x! + 13x! + x + 13 x! + 2x! x! + 13x! + x + 13 3x x! + 1 1 x x + 13 The victim was not mauled by a cougar. Coach Omega was fixing the wooden flooring in the library. Miss Beta was watching a comedy in the movie theater. x! + 2x! + 40x 1 x! + x + 13 The victim did not drown.??? Clark Creative Education
??? Clue #7 1 2x! 5x! 7 1 2x! 5x! 7 3x! 6 2x! 5x! 7 x! 8 2x! 7 Add 1 x! + 1 to 1 2x! 7 Coach Omega was cleaning the pool. The victim was not poisoned by chemicals. Dr. Alpha was playing Go in the atrium. Mr. Epsilon was writing his memoir in the library Clue #8 1 (6x 2 + x)(x 2 +3x) 11 Add 6x! to + x The murder was not done by electrocution. 1 x! + 3x? 11 (6x 2 + x)(x! +3x) 17(x +2) x(x+3)(6x+1) 17(x + 2) x! (6x +1) Professor Delta was sleeping in the movie theater. The murder was not a drowning. Dr. Alpha was running on the treadmill in the gym.??? Clark Creative Education
??? Clue #9 5x! + 6x! + 1 3x! (2x+1) 5x! + 6x! + 3 3x 2 (2x+1) 5x! + 5x! + 3 3x 2 (2x+1) 5x! + 6x! + 3 3x 2 (2x-1) Add Mrs. Gamma was doing P90x in the gym. The victim was not hit by a fallen object. The victim was not drowned. Professor Delta playing with his children in the pool. 5x 6x! + 3 to 1 x!? Clue #10 7x! + x! + 8 x! + x! 7x! x! + 8 x! x! 7x! x! + 8 x! + x! 7x! x! + 8 x! + x! x 1 x! + 1 8 x + 8 x!? Professor Delta was drinking a protein shake in the gym. The victim did not have a venomous bite. Mrs. Gamma was sleeping by the pool. The murder was not an assault with a fallen object.??? Clark Creative Education