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To align lessons with Next Generation Science Standards, I've been working on activities for 9th graders involving cellular respiration and photosynthesis. It's been challenging to present the material in a way that those students can understand. They haven't taken chemistry and have no concept of redox reactions and electron acceptors.

I started with the question "Why do we need oxygen?" What followed was a mini-case study on the Chicago Tylenol murders, cyanide, and finally the electron transport chain. It is intended for 9th graders, so the model is really simplified. 
Part 1: Background. newspaper In September of 1982 ,Mary Kellerman gave her 12 year old daughter a painkiller when she awoke during the night complaining of a sore throat. At 7 am the next morning, her daughter was found collapsed on the bathroom floor, and later pronounced dead.
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+Emaan Fatima thanks
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There is just over a month left before the AP Biology test. I was looking over the formula page and noticed the equation for standard deviation was on it. While I'm confident my students can do a chi square, standard deviation isn't in my curriculum anywhere. I'm hoping this worksheet will help students get a rudimentary understanding in case it comes up on the test. Would love to hear comments or suggestions from anyone who does teach SD.
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Group work is one topic that teachers have really strong opinions about. I use it, but not very frequently and usually as a way to reinforce or enhance topics that were learned via direct instruction.
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I totally agree....4 is too many
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Coincidentally, we were just talking about chimeras in class today. This seems like an extreme case where the baby's father was actually the absorbed (or consumed) twin. The parents had a genetic test done because of the baby's blood type. Strange stuff! 
A couple who used a fertility clinic to conceive was ready to sue when the child’s blood type didn’t match up with mom and dad’s. Obviously the clinic
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Oh wow, that was a really strange case! Thanks for the link.
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BiologyCorner

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Check out this virtual lab on lizard evolution. Students complete tasks and then print out a page that shows that each section has been completed. This might be a nice alternative to other virtual labs I've done in the past, though it seems like students may need a large chunk of time to complete.

Other Evolution Investigations:

Peppered Moth Simulation http://biologycorner.com/worksheets/pepperedmoth.html
Sex and the Single Guppy: http://www.biologycorner.com/worksheets/sex-selection.html
Natural Selection with Bunnies: http://bit.ly/PHETbunny
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Answer key?
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Students are the best editors. I've made some slight changes to the cystic fibrosis case study just to clarify a few things and to address the fact that none of my students had any idea what the disease was or whether you could die from it, so I added a life expectancy chart. One of the questions has us stumped though.

7. Sweat glands cool the body by releasing perspiration (sweat) from the lower layers of the skin onto the surface. Sodium and chloride (salt) help carry water to the skin's surface and are then reabsorbed into the body. Why does a person with cystic fibrosis have salty tasting skin?

The answer was intended to be that the cells could not reabsorb the salt. The question one group had was how the salt got there in the first space. If the channels don't let Cl pass (no reabsorption) how is it being secreted from the cells in the first place in sweat. I've searched on google and haven't found an answer so thought maybe someone here could explain this one. http://www.biologycorner.com/worksheets/case_study_cystic_fibrosis.html
A Case of Cystic Fibrosis baby. Dr. Weyland examined a six month old infant that had been admitted to University Hospital earlier in the day. The baby's parents had brought young Zoey to the emergency room because she had been suffering from a chronic cough. In addition, they said that Zoey ...
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+BiologyCorner i'm also a medical student and i want to know theory behind this topic . will you help me please ? 
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I've been re-working my AP ecology unit to accommodate "senioritis." The changes move the unit away from lectures and note-take to case studies and investigations. The first adjustment was to the Rolly-polly (pillbug) investigation. I've adjusted this lab to include 2 pages of case-work on animal behavior which includes topics such as innate, learned, taxis, and evolutionary basis of behavior. The final task is for them to design and conduct a behavior experiment with pillbugs or other classroom specimens.
Case Study: Survivorship and Population Models. loggehead Part 1: Hatchling Exodus. Amy was very excited to be staying at a resort in Florida where loggerhead turtles lay their eggs. She had carefully read the literature that outlined the rules for her stay. Rules that were in place so that ...
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Adam Bodley's profile photoAlberto Fonseca's profile photoClases de Bioquímica's profile photoMelinda Turner's profile photo
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+Kevin Murray , I love that site.  I use a lot of their case studies.   I haven't paid the fee for the answer keys,  if I can't figure out the answers then the content is probably too difficult for my students.  
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This is the second time in two weeks that I've heard or read about RNA interference. This looks like a good, current article that not only explains gene expression but includes how RNAi can potentially be used to treat disease. With all the information, news, and stories available online, do we even need textbooks anymore?
Hijacking a cell process called RNA interference can let scientists turn off a selected gene. Its silencing can point to what genes do when they’re on — and may lead to new treatments for disease.
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Grades 10-12....Thank you
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I deal with the myth of blue blood every year, but this video is the first to helpfully explain why veins appear blue. Hint: it's the same reason why the sky is blue.
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I've been using google drive this year for student submissions of article summaries. I love the comment system as a way to actually have a conversation with students about their writing. I also love that I don't have a pile of papers cluttering up my desk.
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Thank you for sharing about Classroom--I have all my classes on Google Sites, will look into this.  Could someone address the errors on http://biologycorner.com/worksheets/measuring_with_microscope.html  The scanning shows 4mm or at least 3.8mm, not 3, and it says the low power is 2mm, then all calculations are based on it being 1mm.  Thank You.
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Do your students carry their phones everywhere, snapping photos and selfies to chronicle almost every moment of their day? While the older generation might find this behavior disturbing, there is another way to interpret it: http://huff.to/1CypNzS

"The 'Instagram Generation' now experiences the present as an anticipated memory" -Professor Daniel Kahneman. 

This is what my class looks like on snake feeding day.
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if kids are going to use them no mater what u tell them. Try using it as a tool make them take there phone out an use them to do work. Use them to take a quiz. The first person to text in the right gets a prize etc. Use the distraction of the phone against them. Turn it into something constructive. Have them find info on school websites. Connect with students for education.
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To move away from lecture-based instruction, I've been adding a lot of case studies to units, most are acquired from the National Center for Case Study Teaching in Science. For the cell unit, I made my own case study which focuses on cystic fibrosis and how it is caused by a malfunction in the cell membrane. This will be followed up by articles on Gaucher disease and mitochondrial disorders. The goal is that instead of presenting a very dry lecture on all the parts of the cell, we will be looking at how malfunctions in these parts lead to disorders. http://www.biologycorner.com/worksheets/case_study_cystic_fibrosis.html
A Case of Cystic Fibrosis baby. Dr. Weyland examined a six month old infant that had been admitted to University Hospital earlier in the day. The baby's parents had brought young Zoey to the emergency room because she had been suffering from a chronic cough. In addition, they said that Zoey ...
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Liz Hicks's profile photoFarjana Yasmin's profile photoJessica Robitaille's profile photoVicky Shore's profile photo
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+Kara Papa I do like the slide case studies, less paper to copy!
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Resources for students and teachers of biology and the life sciences.
Introduction
The Biology Corner is a website I started in 2000, over the years I have added content and resources I have used in my biology classes.  Teachers and students alike can find help with concepts, images, and practice quizzes for all major biological topics.  I also include photos of anatomy, mainly from classroom dissections and human models I have in the classroom.