Friday, September 29, 2017

Teach Students the Positive Impacts of GMOs

Scientists often have difficulty communicating their research to the public and false marketing has filled that gap for some time with regards to nutrition and food production.  Meaningless and deceptive labeling have been used and misconceptions have developed.  Social media has exacerbated the disconnect between public perception and reality with regards to nutrition and food production and there are consequences to this distortion.  This gap exists for many well intentioned people and teachers might be the key to bridging the gap.   Public opinion has begun to reverse this trend in topics such as climate change and vaccines but agriculture and food lag behind.  It would surprise many to find that there is greater agreement on the safety of genetic modification of food than there is on climate change.  Many would assume that this ignorance is of minor consequence.  They would be wrong.  As the world population has increased and poverty levels diminish farmers have quietly gone about their business.  Most are unaware that over the past twenty years farming has had very little increase in farming acreage despite farmers feeding many more people due to population growth and reduction in starvation.  
The benefits of using genetic modification with regards to food are diverse and impactful.  The environmental impacts alone are huge and include a reduction in carbon dioxide emissions, less pesticide use, safer pesticides5 and the potential for reductions in animal cruelty6.  Genetic modification has the potential to allow those allergic to peanuts to eat peanuts safely, those with Celiacs disease to eat bread and vegetarians to eat the Impossible Burger © that cooks and tastes like meat due to genetically engineered yeast that produces hemoglobin.  The healthiness of produce that is organic, genetically modified or non-GMO are similar but typically most healthy for the genetically modified versions.  Foods with non-GMO labels often lack vitamins in order to meet the criteria for labeling.  Organic food and traditional agriculture are similar in health benefits but for many the price of organic food would cause the consumer to purchase fewer fruits and vegetables that are one of the most critical components of a healthy diet.  
Scientific evidence can be drowned out by loud voices.  Posting or sharing an article with an exaggerated headline is much more common than one that is scientifically sound.  Many people have heard false information for so long that they are unwilling to believe evidence and will dismiss experts as shills.  These people still influence the supply of food distributors and producers by being organized and frequent communication.  But it is time for the evidence and truth to trump fear-mongering.  Teachers are in a key position to do this.  We have an audience and we are tasked with educating that audience about using evidence, critical thinking and evaluating sources.  Science teachers of all fields can find connections to the environmental impact and potential for genetic modification.  Teach your students about the different methods of genetic modification and point out the absurdity of transgenics being singled out in spite of no evidence of safety differentiation between other genetic modification methods.8    Teach your students about the historical methods of food production and some of the amazing things we do today that improve our lives.  Teach them that the non-GMO movement was one of deception and marketing and that scientific evidence continues to struggle against fear of consumers.  Play an NPR interview with farmers and have them write about whether farmers should cave to financial pressure or do what is best for the planet.  If you want to have a discussion on capitalism and economics make sure to discuss the organic industry and its lobbying efforts along with their deceptive marketing to make money off of the vulnerable (or that purchasing non-GMO leads to an increase in slavery).  Even if you do not teach science you can still make a large impact on your students and your community.  
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Resources for science teachers that I have found helpful:
9.  Video about GMOs for students
10.  Food Evolution narrated by Neil DeGrasse Tyson

Twitter accounts to follow

Please add suggestions for good resources in the comments below too.

Thanks!

Sunday, September 10, 2017

Book Recommendations for Chemistry Instructors

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It can be easy as a teacher to slip into a routine where your focus is solely on student learning.  But as teachers it is important that we value education and learning and a great way to do this is by reading about our fields.  Here is a variety of chemistry and chemistry-related books that I have enjoyed many of which I now use annually in my teaching.  

The best book for chemistry teachers to read is a textbook about physics.  There is yet to be a chemistry version of this, but the author (Arons) spent considerable effort to interview students at various levels about their physics understandings.  One of the key ideas from this book is that students can produce correct answers without understanding what they are saying and this book explores what questions to ask to get to the point where understanding can actually be assessed.  For a chemistry teacher there are topics that might not directly impact their teaching, but energy, force, measurement and many other topics will influence your understanding of the topics and allow you to question at a particle level what is happening in chemistry in a way that you were not able to before reading the book.  The approach to assessment is valuable in all science courses and this book frequently impacts my teaching of chemistry.  This book is quite expensive, so try and find it through a colleague or library first.  It is worth tracking down.

#2 The Periodic Table - Eric Scerri
Eric Scerri has a lot of wonderful books and is able to get into a lot of material that chemistry teachers will often hand wave over.  Here is a blog post about 3d and 4s orbital ordering.  In this book he discusses the first periodic tables developed and what traits each scientist included and omitted.  He talks at length about Dmitri Mendeleev and compares what he did with what others had done before him as well as what others did better than him.  This book also includes some chemistry content about the periodic table that is masterfully presented.  The book’s subtitle “Its Story and its Significance” is also appropriate as the book builds an appreciation for the wealth of experiment that resulted in the modern periodic table.  Chemistry teachers often celebrate the mole, but the periodic table is a much more important accomplishment.  

#3 The Poisoner’s Handbook - Deborah Blum
The title of this book caught my eye and the book far exceeded my expectations.  Deborah Blum works through a series of different poisons all through the lens of the founding of respectable forensic science during the prohibition era in New York City.  This book discusses poisons, antidotes, detection, history and politics along with some captivating stories.  This is a much lighter read than the first two books but also might contribute many interesting anecdotes to your teaching.  

#4 Napoleon’s Buttons - Penny Lecouter and Jay Burreson
Napoleon’s Buttons suggests 17 chemicals that could be considered to be the most influential in world history.  The book goes through some chemistry and some history and it absolutely loaded with interesting information about both.  The connections between the two are also really well developed and this was an enjoyable and educational read.  

#5 Great Physicists - William H. Cropper
This is a book that is a series of biographies about famous physicists.  The best part of this book to me is that it gives a fantastic rundown of the development of thermodynamics that includes the key experiments and the confusion that resulted from them.  The book balances the personal stories of the scientists with their key experiments and also some basic theory about the physics they did.  Your lectures about entropy and Gibbs free energy will be better after reading this book.  

#6 Chemistry in your Kitchen - Matthew Hartings
A chemist that loves to experiment with cooking and is well versed in the chemistry we know and do not know about with regards to cooking.  This book was very interesting, a lighter read and also might inspire you to cook something.  The book is very well written in that it will connect chemistry and other science concepts with cooking, give some potential recipe alterations but it allows you to put together your own alterations rather than just providing too much direction.  I very much enjoyed this book and I will be seeking out more reading about the topic.  This book has 15 chapters that each detail a specific food or drink, some personal connections and some science behind the cooking variations possible.  

Andy Brunning makes infographics for chemicals that you typically are not aware of but have experienced nonetheless.  He is great to follow on twitter and this book is a collection of his most interesting chemistry graphics organized by themes such as poisons, colour and lots of food information.  If you are a chemistry teacher I highly recommend you purchase a poster for your room from his collection.  

#8 Uncle Tungsten - Oliver Sacks
This is the story of Oliver Sacks as a  young child who has a surprisingly large access to chemicals.  Oliver describes his curiosity as a child, how his family and friends supported this curiosity and a variety of experiments and experiences that shaped his knowledge of chemistry.  There were a few experiments that were new to me that I ended up trying from this book and the perspective is a good one to experience as a chemistry teacher.  

#9 A Tale of 7 Elements - Eric Scerri
Prior to Moseley’s experiments determining atomic charge, there were many quibbles over element discovery.  After his development of the answer key for the periodic table so to speak there were 7 elements missing between hydrogen and uranium.  This book describes the search and discovery of these 7 elements.  The philosophy of how credit should be awarded is discussed with some interesting plots such as an element that was discovered and then later a more stable isotope was found.  And Tc was discovered frequently before it was actually discovered.  Eric Scerri was the one author to appear on this list twice and he has written several other great books that I have enjoyed reading besides these two.  

#10 Transforming Matter - Trevor H. Levere
Starting with alchemy this book moves through the history of chemistry particularly focusing on the early scientists and their struggles to make conclusions from experiments when there was not a lot of knowledge to build on.  A lot of good information about Antoine Lavoisier, Jacob Berzelius and a wide variety of scientists that were familiar and many that I was not aware of.  This book had a lot of interesting stories about the politics and drama behind the scenes of the famous experiments with plenty of chemistry mixed in.  

#11 Elements - Theodore Gray
This book is now a series of books (Molecules, Reactions, The Element Vault) that pair good photographs along with chemicals.  I have used these books to start class off by reading to my students about a particular element or compound and there are many interesting facts presented about them along with a quality picture to go with that information.  The Element Vault also comes with a thin sheet of gold foil (and a couple other fun things) if you happen to teach Rutherford’s gold foil experiment.

#12 Plutonium - Jeremy Bernstein
This book caught my eye at a bookstore and I enjoyed it very much.  The book discussed the discovery of plutonium in the context of world war II.  It combines the historical perspective with the challenge of being able to separate elements with such similar electronic structures from each other when elements only differ based on electrons two energy levels beneath the valence shell.  

#13 Chemical History of the Candle - Michael Faraday
There is a horrible tendency in chemical education to avoid understanding what a flame is.  A flame combines chemical reactions with light and to really comprehend at the particle level what happens in a flame is often diminished by vocabulary in place of visualization.  This book is unique in that it discusses a brief history of the lectures at the Royal Society and then works through the demonstrations done by Michael Faraday to show how a candle works.  The chemical demonstrations are brilliant given the time they were executed and could be replicated in the classroom with a bit of glassware preparation.  The lecture is really a great example of phenomena based teaching or utilizing evidence in the classroom.  


Currently reading
The Chemistry Book - Derek B Lowe - This book is a similar to the Elements series by Theodore Gray but from a historical lens.  It moves through major milestones in chemistry by assigning each a date as best as possible.  On one page is a picture of the chemicals or scientists or apparatus and on the other are a couple of paragraphs describing the event and its significance.  

I lucked into this book while in a used book store.  It was written in the 1950s and is a really interesting perspective as it discusses the challenges that accompanied scientific discoveries (before cars, before paid lab positions, before science supplies could be purchased).  I have not yet reached the gold foil experiment, but Rutherford really accomplished a lot prior to that experiment that might often be overshadowed by one of the most important experiments in science.  

In queue
The Secrets of Alchemy - Lawrence M. Principe