Day 11

 Objective:  To provide activities to introduce concepts about the pulley  Materials: 1,000 gram spring scale, 1,000 gram weight, 5 single pulleys, 2 double pulleys, 1 triple pulley  Large group activity:  Demonstrate for the students the use of the pulley.  Inform students that a pulley is a wheel with a rope or chain wrapped around it.  Pulleys are often used to change the direction of a force or create a mechanical advantage.  Encourage students to use these centers as a springboard to heighten their interest in and understanding of how the pulley can make work easier.  Centers:  Allow students to participate in the centers involving pulleys.  Center 1:  Heave Ho.  Allow students to lift a variety of objects using a hanging pulley tied to a board and a pulley that moves along a string attached to a board.  Ask which system takes less force to lift the same load the same distance.  (The moving pulley attached to the board requires less force since half of the wight is supported by the board.  The first pulley acts as a seesaw with the force on one end being equal to the weight of the resistance or load).  Center 2:  Double Trouble.  Ask the students if the way that you attach the rope to the two single pulleys make a difference.  Ask the students to make inferences in response to these questions:  How are the two pulley arrangements different from the single pulley?  Does the amount of force needed seem different in either arrangement?  Allow students to use a spring scale to compare the amount of force needed for each.

 Day 12

 Objective:  To apply principles of simple machines to create and use simple machines.   Materials:  The Littles and the Trash Tinies class set of books, fruitcake recipe and ingredients, kitchen tools, pictures of a carnival   Small group activity:   Provide ingredients and recipe for students to create a simple no-cook fruitcake in small groups.   Large group activity:   Present the week long activity of creating a "Carnival of Rides for the Littles."  Discuss that rides at the fair use simple machines.  Discuss and list as a large group the varied simple machines that are used in varied rides.  Tell students that they will be working in cooperative groups to construct rides consisting of simple machines for the Littles.  Tell the students that they should build the rides for pretend people three inches high.  Briefly review each simple machine.   Centers:   Allow students to explore the centers.   Center 1:  Play Kitchen.  Use varied kitchen tools that are simple machines to create a cooking center or a play kitchen with utensils.   Center 2:  Kitchen Mechanics.  Let students divide into cooperative groups to identify the simple machines in kitchen tools.  Discuss uses.   Center 3:  Picture This.  Have students look through tool and kitchen appliance catalogs.  Encourage them to look for different applications of the various simple machines.  Have students sort and glue these pictures according to the simple machines contained within.   Musical connection:   Have a variety of musical instruments.  Ask students to identify what simple machines are present in these instruments.  Make a list of each instrument and the simple machines are evident.   Large group activity:   Ask students to share ways that a lever, inclined plane, screw, wedge, wheel and axle, pulley are used in every day life.  Show students pictures of a local amusement park or fair. Have them identify the various simple machines found in each attraction and describe how the simple makes the mechanism work (sky lift, bullet, merry-go-round, ring the bell, etc.).

 Day 13

 Day 14

 Objective:  To expand and integrate skills and concepts.   Materials: junk materials   Math connection:   Make up some problem solving questions relating to the Littles material.  Cooperative group work:   Provide varied materials and guidance for the carnival project.  Language arts connection:   Write a daily journal of each day's progress concerning the carnival project.  Social studies connection:   Work on the mini-society plans.

 Day 15

 Objective:  To expand and integrate skills and concepts.   Cooperative group work:   Provide time and guidance for working on the carnival project as well as the mini-society plans.   Language arts connection:   Ask students to work in journal compiling the daily progress of the project.

This integrated unit was prepared by teachers of the:

 Henry County Public Schools 396 Tomlinson Street McDonough, Georgia 30253 USA Phone:  770/957-6601