Grade/Subject: High School Agriculture Mechanics

Lesson Plan

Teacher: Jake Gordanier [email protected] Grade/Subject: High School Agriculture Mechanics Lesson Title: Measuring Date: 7/8/08 Materials: 5-10 Measuring Tapes or Straight Edge Handout

Objectives: The learner will identify different types of measuring devices with 100% accuracy. The learner will correctly explain how to read a measuring tape. The learner will add and subtract fractions with 90% accuracy. The learner will correctly demonstrate an understanding of how to measure lumber. The learner will correctly define the terms fraction, U.S. Customary system, and metric system. The learner will correctly compare and contrast the U.S. Customary system to the metric system.

Modifications:

Time Process Activities 5 min Start the class with several different length pieces of Anticipatory lumber laid out in the classroom. Have directions on the board to come in get into groups of two, measure the wood with accuracy, then add all the measurements together and record their answer. Then ask for their answers have one student from a group that got the correct answer to show their work on the board. (Problem Solving) The students will complete a handout for taking notes. Objective Then they will complete a graded homework assignment for their final assessment. 15 min Give students a hand out that has different types of Input measuring devices. Have the student fill in the blanks to label each device. Then define the terms U.S. Customary System, metric system, and fraction. Next focus on the measuring tape. Explain to the students how to read a measuring tape properly. Giving precautions about bending, breaking, or cutting their hands. 5 min The hand out will have a picture of a measuring tape with Modeling several letters. The teacher will have a larger representation up on the board. Show the students how to work the first one or two problems. Do them as a class. Also do several problems using metric. Have the class discuss how metric is easier due to the uniformity. 5 min Why is proper measuring so important? How does Questioning knowing how to read a measuring tape help to add and subtract fractions? What are some of the differences between U.S. Customary and metric? Give some of the benefits of each? Why do you think the US has not changed over? 15 min Students will use the handout to take notes. They will fill in class Guided in the blanks to label the different measuring devices. Practice They will define the terms. Then they will read the measuring tape picture on their handout and record their answers. During this time the teacher will walk around the room and quiz students as well as help them with any questions. 30 min The students will continue the handout with word at home Independent problems. They will turn this in for a grade. Practice In future classes, when students are preparing to go to the Continuation shop, a short quiz can be given to ensure that they can properly read a tape measurer. *Measure twice, cut once* Assessment The students will turn in their homework for a grade. They will also be asked to identify the different types of measuring devices while in the shop. Then when they go out to the shop the teacher will observe their use of the tape measurer.

Reference: http://www.funbrain.com/measure/index.html http://www.calaged.org/ResourceFiles/Curriculum/advcluster/2000.htm Agricultural Mechanics Fundamentals & Applications 4th Edition IMS Measuring and Marking Devices

Name ______Date ______Properly Measuring and Fractions Identify: 1) 2) ______3) 4)

______

The Inch vs. the Millimeter: A. The Inch as a Unit of Measurement 1. The inch is the traditional unit of measurement for wood- and metalworking in the United States. a. It must be divided into smaller units to be useful for most applications. b. Some fine rules or scales may have as many as 32 marks per inch. 1) Each mark is 1/32 of an inch apart. 2) One-sixteenth inch is more commonly used as the smallest unit on a rule. c. Lines of different lengths are used to show 1/2, 1/4, and 1/8 of an inch on many measuring devices such as rules and squares. B. The Millimeter as a Unit of Measurement 1. The millimeter (mm) is slightly smaller than 1/16 of an inch. 2. It is a very convenient unit for linear measurement without using fractions. a. It has the advantage of being 1/1000 of a meter and 1/10 of a centimeter. 1) This means one meter plus 250 millimeters equal 1 1/4 meters. b. On many metric rules, each centimeter division contains 10 marks to represent millimeters.

Definitions: 1) The term ______means a part or portion of a whole. 2) Formerly called the English system, the ______has always been the standard system of measurement in the United States. This system uses the inch, foot, yard, and mile as units. 3) The ______of measurement has always been used for scientific work in the United States, and is the standard system of measurement in most other countries.

The Process: **Use caution while using the tape measurer and straight edge, as not to cut your hands, or bend and break the tape.** A. Using a Tape Measure to Measure and Mark Wood: 1. Measuring the Distance between Two Points: a. Place the end of the tape precisely on the first point. 1) The hook on the end of most tapes slides a distance equal to the thickness of the hook in order to provide accurate measurements whether it is hooked onto the end or edge of a board or pushed against a surface. b. Extend the tape to the second point. 1) Make sure all slack is taken out of the tape between the two points, or the reading will be too long. 2) Make sure the tape is straight with the edge of the board being measured. If the tape angles even slightly across the board, the reading will be too long. c. Read the tape at the graduation line on or nearest the second point 1) If measuring the distance between two inside surfaces, push the tape hook against one side and the tape case against the other, then read the graduation line nearest the tape case and add the length of the case to the reading. Problems: 1) A B C D E F G

A) ______B) ______C) ______D) ______E) ______F) ______G) ______

2) A B C D

A) ______B) ______C) ______D) ______Take home and return tomorrow: 3) On most tape measures and straight edges the shortest line represents a. 1/8 inch b. 1/16 inch c. 1/64 inch d. 1 inch

4) Which is the smallest unit of metric measurement? a. meter b. centimeter c. centimeter d. yard

5) Compare and contrast the U.S. standard system to the metric system.

6) If a carpenter has cut two pieces of lumber one is 3 ½ inches long, the other is 4 3/8 inches long. If he puts the two pieces together how much total lumber does he have?

7) If a carpenter has a piece of lumber 10 ¾ inches long and he need a piece 8 ½ inches long, how much does he need to cut off?