ST 660 Special Session on ICBL Margaret Waterman Southeast Missouri State University Ethel Stanley...
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Transcript of ST 660 Special Session on ICBL Margaret Waterman Southeast Missouri State University Ethel Stanley...
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ST 660
Special Session on ICBL
Margaret Waterman
Southeast Missouri State University
Ethel Stanley
Beloit College
Investigative Cases:Engaging Students in
Scientific Problem Solving
Year Male Female
1911 50.9 54.4
1912 51.5 55.9
1913 50.3 55
1914 52 56.8
1915 52.5 56.8
1916 49.6 54.3
1917 48.4 54
1918 36.6 42.2
1919 53.5 560
20
40
60
80
100
120
140
160
0 20 40 60 80 100Time
# P
eo
ple
Susceptible # Infected # Recovered #
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"I read on the Internet that you can get Mad Cow Disease from Altoids."
The Rumor
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"Well, they are made in Great Britain and they do have gelatin in them.”
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What do you think this case is about?
What do you already know that relates to this case?
What do you need to know to understand the case?
How do think this case could be used?
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Challenges for Science Instruction: NSF
1. Include inquiry so students understand the process of science.
2. Relate science to what students already know.
3. Put science in social and technological perspective.
4. Encourage collaboration and student responsibility for learning.
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Cases are one tool to answer these challenges
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Case Methods: Elements in Common
All use realistically complex problems
All are multidisciplinary
All ask learners to consider the events, decisions, facts
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Case Methods provide learners with an opportunity to:
• Engage with characters and circumstances.
• Investigate to understand facts, values, contexts, and decisions.
• Connect the meaning of the story to their own lives
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Some Core Features of PBL /ICBL
Problems are real and meaningful contexts for learners.
PBL cases are complex and multidisciplinary. The problem comes first. Learners collaborate and identify what they need
to learn. Learners identify and use resources. Problems require decision making, use of
concepts and skills.
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Investigative Case Based Learning
ICBL blends two established methods: cases and scientific inquiry The cases provide a context for learning. Students engage in investigations related to the case.
This includes lab, field, and computer activities.
Instruction is organized around the BioQUEST 3Ps.
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The BioQUEST 3Ps
The BioQUEST philosophy is based on the activities of practicing scientists.
Problem posing Problem solving Peer persuasion
http://bioquest.org
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Key Questions for Planning to Teach with a Case
What is something related to the case that students could investigate?
What resource might be useful in a student investigation ?
What kinds of products could students produce related to this case?
What learning objectives can be addressed?
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Meet Diverse Objectives by varying PBL implementation:
To assess knowledge and skills To initiate investigations To introduce new technologies To develop global and multicultural perspectives To see value of interdisciplinarity
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"I read on the Internet that you can get Mad Cow Disease from breath mints.”
The Rumor
Using PBL: Pre- Assessment
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Using PBL: Assessment
Resources for each student: prepared slide of suspect plant material list of back yard plants by gardener
The following take home exam was based on a mini case in which a 14 week-old puppy that “chews on everything” was found ill in the back yard.
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Using PBL: Assessment
Submit a memo reporting your findings as a forensics specialist:
Provide an identification of the plant material with evidence to support choices:
root, stem, or leaf dicot or monocot herbaceous or woody
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Using PBL: Assessment
:
Write a short letter to the pet owner advising the family to remove the poisonous plant from their back yard:
Provide a description of the plant as it would look during flowering and be sure to include:
• common and scientific name• habitat preference• danger to humans
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To assess knowledge and skills To initiate investigations To introduce new technologies To develop global and multicultural perspectives To see value of interdisciplinarity
Meet Diverse Objectives by varying PBL Implementation:
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New York 99
Ben called his old friend Lynn after hearing the latest count of people sick with West Nile Virus.
"Hey Lynn, you work in environmental health. What can you tell me about this West Nile Virus? We have a real epidemic going on here in Texas and everyone is saying it came from your state."
Lynn groaned "I am so sick of New York being blamed! West Nile Virus has been around a lot longer, and it is called West Nile for a reason,” she huffed. “It is true that the first U.S. virus was detected in 1999 in a dead flamingo and a sick horse in New York City. But now it's all over the US. "
"It sure is - but, wait - a bird and a horse? I don't get it."
Using PBL: Investigations and Technologies
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End of 2003
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Clinical course of West Nile encephalitis
Solomon, T., Brit. Med. J. 326, 865-869 (2003)
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“It’s called West Nile for a reason. . .”
Data set from http://bioquest.org/bedrock/problem_spaces/wnv/data.php
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The Biology WorkBench is a web-based resource for analyzing and visualizing molecular data developed at NCSA (the National Center for Supercomputing Applications). Database searching is integrated with access to a wide variety of analysis and modeling tools
http://workbench.sdsc.edu
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Aligned Sequences of WNV E Gene
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Approximate global distribution of West Nile virus
Solomon, T., Brit. Med. J. 326, 865-869 (2003)
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Using Cases: Lab Technology
http://ublib.buffalo.edu/libraries/projects/cases/lucre1.html
FILTHY LUCRE:A Case Study Involving the Chemical Detection of Cocaine-Contaminated Currency
Ed AchesonDepartment of ChemistryMillikin University, Decatur, IL
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Using Cases: Lab Technology
Tom Brown [was daydreaming while standing in the security line at the airport.] He was in a particularly good mood because Grandma Brown had given him $200 in cash as a Christmas present ... Tom had tucked the cash into his carry-on.
"Sir?” repeated a loud voice. “We have detected evidence of illegal drugs and will need to search your carry-on.”
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Using Cases: Lab Technology
Tom’s cash ($200 in ones) will be treated with methanol to extract any cocaine present in the money. The extract will then be injected into the gas chromatograph / mass spectrometer (GC/MS), which will determine if any cocaine is present.
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Using Cases: Lab Technology
•Roll the bill and place it into a clean vial.
•Add 2 mL of methanol to the vial.
•Cap the vial and shake for 1 minute.
•Using a glass Pasteur pipette, transfer enough methanol to an autosampler vial to fill the vial about three-quarters full.
•Remove the bill from the vial when you are finished using a forceps.
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Meet Diverse Objectives by varying PBL Implementation:
To assess knowledge and skills To initiate investigations To introduce new technologies To develop global and multicultural perspectives To value interdisciplinarity
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In the 1840’s, Late Blight devastated the potato crop which resulted in mass starvation and forced migration of the human population.
Using PBL: Multicultural & Interdisciplinary
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Using PBL: Simulating Late Blight
http://www.bioquest.org/BQLibrary
Free software available at the link below. Click on “Modules” and then on “Lateblight”
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Sporangia from cull pile
Infections from volunteers
Crop defoliated and entirely lost well before harvest
Simulation Results: IRELAND 1840’s
Cool, wet conditions, no pest management
% blight
sporangia
infections
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Modern Management: Blight CastUsing 1840 conditions. Result of spraying every 5 days = $278 profit, no tuber loss, 3% foliage loss.
sprays sporangia
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Meet Diverse Objectives by varying PBL Implementation:
To assess knowledge and skills To initiate investigations To introduce new technologies To develop global and multicultural perspectives To value interdisciplinarity
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Footprints
“I’m glad I don’t live on a 200 acre farm like you, Sam!” teased Sue as the two friends hurried into their Biology class.
“Why?” asked Sam, “Weren’t you just complaining about living in your parent’s downtown condo?”
“Well, that’s true,” Sue admitted, “But I was thinking about today’s class assignment on sustainability. I bet you have the biggest footprint in the whole class.”
Much to Sue’s surprise, Sam didn’t look all that concerned. He held out his hand and replied confidently, “I’ll take that bet!”
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What is this case about?
What do you already know?
What do you need to know?
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Online Tools: a global resource used locally http://www.earthday.net/footprint/index.asp
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Questions from Footprint Quiz
Food: amount of meat, how much food is local
Goods: how much waste is produced Shelter: size of home, number of people,
availability of water and electricity Mobility: kinds of transportation, car
pooling, air time, fuel efficiency
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The Results
Sue Sam
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Go to Footprint quiz and find out your ecological footprint
http://www.earthday.net/footprint
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What could you teach with this?
What kinds of resources might be useful?
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http://pdf.wri.org/navigating_numbers.pdf World Resources Institute, 2005, Navigating the Numbers, pp. 4,5
Global Data and Visual Resource
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Global Data Resource: One Policy for All?
http://pdf.wri.org/navigating_numbers.pdf Navigating the Numbers: Greenhouse Gas Data and International Climate Policy
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Sources of GHG by Level of Economic Development
http://pdf.wri.org/navigating_numbers.pdf Navigating the Numbers: Greenhouse Gas Data and International Climate Policy
Global Data Resource: One Policy for All?
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http://www.esrl.noaa.gov/gmd/ccgg/carbontracker/
Interactive Data Source
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Visual Data
http://www.esrl.noaa.gov/gmd/ccgg/carbontracker/maps.php?type=glb&prod=columnsNOAA Carbon Tracker
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T. BARTLEY: . . you ain't old enough to rememberthe year the flu struck the people so bad in this . . . in this country, do you? HAWKINS: Yeah, I think that both my… both my great-grandparents died in that. T. BARTLEY: It was the saddest lookin‘ time then that ever you saw in your life. My brother lived over there in the camps then and I was working over there and I was dropping cars onto the tipple. And that, that epidemic broke out and people went to dyin’ and there just four and five dyin‘ every night dyin’ right there in the camps, every night. And I began goin‘ over there, my brother and all his family took down with it, what’d they call it, the flu? Yeah, 1918 flu. And, uh, when I’d get over there I’d ride my horse and, and go over there in the evening and I’d stay with my brother about three hours and do what I could to help ’em. And every one of them was in the bed and sometimes Doctor Preston would come while I was there, he was the doctor. And he said “I’m a tryin‘ to save their lives but I’m afraid I’m not going to.”And they were so bad off. And, and every, nearly every porch, every porch that I’d look at had—would have a casket box a sittin’ on it. And men a diggin‘ graves just as hard as they could and the mines had to shut down there wasn’t a nary a man, there wasn’t a, there wasn’t a mine arunnin’ a lump of coal or runnin' no work. Stayed that away for about six weeks. .
http://historymatters.gmu.edu/d/107“There Wasn’t a Mine Runnin’ a Lump O’ Coal”: A Kentucky Coal Miner
Remembers the Influenza Pandemic of 1918–1919
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1.What is this case about?Flu of 1918 and its effects on coal mining, community
Know Wish to Know
There was a pandemic of flu in 1918.It killed many people.It interrupted work, mines closed.Some people lived in camps.It lasted about 6 weeks, according to the transcript.The doctor felt he couldn’t help people get better.Dealing with the dead was a huge issue.In 1918, World War I was ending.There were no vaccines then.Viruses were unknown.Influenza is caused by a virus.There’s a flu shot that you get every year.
Did soldiers/sailors bring the flu from elsewhere?Was there flu in other countries besides the US?How long did it last? What treatments were available then?What treatments were available now? How is flu spread?Why did so many people die of it?What made this particular flu so deadly?Do people die of flu today, like the annual flu? Have there been other epidemics of flu?Could it happen again?
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Currently, 16 antigenically distinct groups of H molecules and 9 distinct groups of N molecules have been identified. The immune system responds specifically to each of the H and N surface proteins found in a virus particle. How many possible combinations of H and N could occur?
Human glycoprotein receptors (eyes, nose, upper throat) for H1, H2 and H3 influenza A facilitate transmission of these strains among humans. How many of the total influenza A combinations above would you expect to be easily transmissible to humans?
Content, directive
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Interactive Maps
http://news.bbc.co.uk/1/shared/spl/hi/world/05/bird_flu_map/html/1.stm
http://www.msnbc.msn.com/id/12375868/from/ET/
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http://www.demog.berkeley.edu/~andrew/1918/
Data
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Year Male Female
1911 50.9 54.4
1912 51.5 55.9
1913 50.3 55
1914 52 56.8
1915 52.5 56.8
1916 49.6 54.3
1917 48.4 54
1918 36.6 42.2
1919 53.5 56
Average Age at Death from 1911 until 1919 (Noymer 2007)
Making Inferences
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Age 1917 1918
<1 2944.5 4540.9
1--4 422.7 1436.2
5--14 47.9 352.7
15-24 78 1175.7
25-34 117.7 1998
35-44 193.2 1097.6
45-54 292.3 686.8
US Deaths per 100,000 Attributed to Influenza and Pneumonia in 1917 and 1918 (Noymer 2007)
Making Inferences, extended
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Street car conductor in Seattle not allowing passengers aboard without a mask.
Record held at: National Archives at College Park, MD. 165-WW-269B-11
In 1918, Seattle public health officials required all passengers and employees mass transit systems wear masks. At that time no one knew what caused the influenza and vaccines were not available. It was understood that coughing and sneezing contributed to the spread of the disease. Spitting was also prohibited in many cities.
Mitigation Strategies
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Predict generally what changes you’d expect to see in the SIR model results with respect to S, I, and R individuals if you were to simulate the use of masks. (Hint: Assume a 10% decrease in transmission.)
0
20
40
60
80
100
120
140
160
180
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0 20 40 60 80 100Time
# P
eo
ple
Susceptible # Infected # Recovered #
Tools
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Resources from Biological ESTEEM: Excel Simulations and Tools for Exploratory, Experiential Mathematics
http://bioquest.org
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Modeling, scaffolded
Pharmacological Interventions• Vaccination• Antivirals as prophylactics
Nonpharmacologic interventions (NPIs) – efficacy and gaining compliance
• Community mitigation (school closures, restrictions on movements)
• Quarantine and isolation of healthy and sick individuals
• Travel restrictions locally and globally• Social distancing • Use of masks and increased hygiene
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Simulation Results for Scenario 2 of Avian Influenza with 250 people (200 susceptible) and the use of masks with a 10% reduction in transmission.
Masks are used starting on day 30, when the epidemic has already nearly run its course.
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What would happen if masks were used starting on day 10? How about on day 0?
Go to http://bioquest.org/casebook Click on “Unit 9”, then on “SIR model”
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How would cases work in your teaching?
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Warning!
Case in Use
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Angela sighed as she held a copy of Derrick’s Malaise. “I’m supposed to come up with my own problems for study in this bio course?” she asked no one in particular.
She re-read the short case.
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“What caused Derrick’s malaria?” Angela thought. The only thing Angela knew about malaria was that people got it when they lived in other countries.
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Angela noticed other students going to the computers or leafing through books at the front of the room. She decided to go to a computer herself.
Using Google, she looked up malaria and found the Mosquito Bytes site.
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http://whyfiles.org/016skeeter/malaria2.html
When the teacher walked by, he saw this on Angela’s screen.
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Do you think Angela is a good student?
How could we help her?