Teacher Page for the Dilemma of the Dangerous Meatloaf

R. Scott Auble
3/7/01
This WebQuest is designed to meet dual goals within a standards-based 7th grade curriculum within the California School System. The first goal is to give an introduction to and practice using dimensional analysis and conversion factors to meet California Math Standards. The second goal is to teach students how to analyse and critically evaluate the nutritional value and health impacts of food, which meets the California Health Framework Addendum Draft Standards.

An additional goal of this WebQuest is to promote Information Literacy and National Educational Technology Standards. Students will need to locate and analyze information from the Web to complete the project. In order to teach this WebQuest successfully the teacher should be able to coach students to successfully find the desired information on their own.

If you have taught WebQuest units in the past, this may possibly be a different approach for you as many WebQuests are already linked to the information the teacher wishes the students to use. It will be a challenge for you as an educator to accept that students will find different and possibly conflicting information which you will have to help them interpret.

Students will need to use problem-solving strategies and critical thinking during this WebQuest and you should be prepared to guide them to successfully learn and apply these techniques as the need arises. The following link (Activity5.doc) provides a lesson in Web search strategies using keyword searches, which you may find helpful in preparing your students.
 

Teacher Materials for the Activity Section

Step 1 - Helping students search for a recipe. Refer to the Student page, Search Tip #1. Demonstrate using this search with a projector, having the students follow along. Show them how to search within results for the word "meatloaf" or "meat loaf" using the Edit/Find option of the browser. You may need to show them that many meat loaf sites are about the musician and how to exclude these using "-music". I suggest 5 extra points might be reasonable for the students that get their recipes in this way, have them find 3 and let them pick one to use.

Step 2 - have students from teams and brainstorm several ways to locate the information. It would be good to have a class discussion about the relative merits of  the suggested strategies. The students should think of questions they would want to ask to see if the food's content is healthy or unhealthy. Then ask for the class to suggest professions or organizations that might be able to answer the questions.

In the teams, the recorder role is responsible to record the group process, who contributed what, what others said about it, and any decisions reached. You may want to model that role for the class so they get the idea. The time-keeper is supposed to watch the clock and point out when the group has spent more than 1/3 of the time on a particular idea and make sure all three ideas have been documented before time runs out. You will probably have to go around to the groups at work and make sure the timekeeper is keeping things on track. The other two members are Contributors. Their responsibility is to put forth what they know about nutrition and organizations that gather and disseminate information about it. If they don't know much, ask them to just make lists of what they know or have heard is good or bad for the health and where they heard it, then compare to see if the recipe has these things in it. If the source was friends or family have them check to see where that person got the info, or try to guess. Switch recorders and timekeepers at the 1/2 way point so everyone on the Team gets to contribute.

As far as how the document gets produced, probably the best writer or typist should do most of it. Cutting and pasting from the recorder notes is a good idea. Have the whole team cluster around a workstation and contribute to this part too. Have teams check grammar and spelling and produce a good work product. Make sure the teams all have a strong writer.

Step 3 - Searching for information. Make sure to model the process of looking for the information as shown in the sample lesson above. List keywords together, circle the ones you want to use, and demo a search in a search engine for the class. Make sure not to let the students search on their own until all have been successful finding at least one source with teacher help.
As they search go around the room and make sure you ask how long they have been on a particular page if you don't see useful info their, or how do they know what they are reading is accurate (suggest they cross check their info) etc. Show them how to save URLs as bookmarks and in a Word processor

Step 4 - Conversions. This is bound to come up at this point when actual ingredients and amounts of them are scrutinized. Demonstrate dimensional analysis and conversion for the class, and ask students who think they have got it to demonstrate for the class. Have students make a table showing the amounts that are healthy of different ingredients and what their recipe has, and compare across recipes and discuss.

Step 5 - Meat loaf court. You might want to demonstrate arguing from both sides of the issue to the class to show they are supposed to take a position and defend it with logic and evidence. Show how the judge should examine the evidence critically to see that it is factual, authentic, and valid. Filming this activity could provide valuable insight into how the students perceive their arguments and how decisions are made, you could then show the movies to the class and have a classroom discussion about key events that happened.
 

California Math Standard for grade Seven Back to text

Measurement and Geometry

1.0 Students choose appropriate units of measure and use ratios to convert within
and between measurement systems to solve problems:
1.1 Compare weights, capacities, geometric measures, times, and temperatures within
and between measurement systems (e.g., miles per hour and feet per second, cubic
inches to cubic centimeters).
1.3 Use measures expressed as rates (e.g., speed, density) and measures expressed as
products (e.g., person-days) to solve problems; check the units of the solutions; and
use dimensional analysis to check the reasonableness of the answer.

California Health Framework Draft standards for Health Education

 
GRADES K-3  GRADES 3-6  GRADES 6-9  GRADES 9-12
• Make healthy food choices
• Group foods in many different ways
• Establish and
maintain healthy
eating practices
• Prepare a variety of
foods
• Compare caloric
values of foods
according to the
percentage of fat,
protein, and
carbohydrate they
contain
• Select appropriate practices to maintain, lose, or
gain weight
 
• Recognize the need for updating one’s personal nutrition plan as individual
needs or activities
change
Read and interpret information available
on food labels
•Use labels to compare the contents of food products
•Identify ads and recognize strategies used to influence
decisions
•Use critical-thinking skills to analyze marketing and advertising
•Practice various positive responses to those influences techniques and their influence on food selection information to make healthy food choices
•Purchase nutritious foods in a variety of settings
•Use unit pricing to determine the most economical purchases
•Analyze and taste foods from different ethnic and cultural groups
•Develop basic food-preparation skills
•Use effective consumer skills to purchase healthy foods within budget
•Use valid nutrition constraints
•Use critical-thinking skills to distinguish facts from fallacies concerning the nutritional value of foods
•Adapt recipes to make them more healthy by lowering fat, salt, or sugar andincreasing fiber
•Use critical-thinking
skills to analyze weight modification practices and select appropriate practices to maintain, lose, or gain weight according to individual need and scientific research

National Educational Technology Standards for Students Back to Text

                              1.Apply strategies for identifying and
                                solving routine hardware and software
                                problems that occur during everyday
                                use. (1)

                              2.Demonstrate knowledge of current
                                changes in information technologies
                                and the effect those changes have on
                                the workplace and society. (2)

                              3.Exhibit legal and ethical behaviors
                                when using information and
                                technology, and discuss consequences
                                of misuse. (2)

                              4.Use content-specific tools, software,
                                and simulations (e.g., environmental
                                probes, graphing calculators,
                                exploratory environments, Web tools)
                                to support learning and research. (3, 5)

                              5.Apply productivity/multimedia tools
                                and peripherals to support personal
                                productivity, group collaboration, and
                                learning throughout the curriculum. (3,
                                6)

                              6.Design, develop, publish, and present
                                products (e.g., Web pages,
                                videotapes) using technology resources
                                that demonstrate and communicate
                                curriculum concepts to audiences
                                inside and outside the classroom. (4, 5,
                                6)

                              7.Collaborate with peers, experts, and
                                others using telecommunications and
                                collaborative tools to investigate
                                curriculum-related problems, issues,
                                and information, and to develop
                                solutions or products for audiences
                                inside and outside the classroom. (4,
                                5)

                              8.Select and use appropriate tools and
                                technology resources to accomplish a
                                variety of tasks and solve problems.
                                (5, 6)

                              9.Demonstrate an understanding of
                                concepts underlying hardware,
                                software, and connectivity, and of
                                practical applications to learning and
                                problem solving. (1, 6)

                             10.Research and evaluate the accuracy,
                                relevance, appropriateness,
                                comprehensiveness, and bias of
                                electronic information sources
                                concerning real-world problems. (2, 5,
                                6)