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Poor Grades Tied to Class Times That Don’t Match Our Biological Clocks

910 points| dpflan | 8 years ago |news.berkeley.edu | reply

432 comments

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[+] endymi0n|8 years ago|reply
I used to have lots of problems getting up early and always championed later times. Growing up through my twenties, it was great seeing finally seeing more and more evidence for a later school start and I was hopeful for future teens.

But it wasn't until my first kid that I finally understood that school doesn't start this early because it's good for the learning experience.

It starts this early so parents can get their kids to school and start working afterwards, without getting fired.

[+] zaroth|8 years ago|reply
Our school district just spent the last year trying to convince parents we should shuffle around start times to make high school later and elementary school earlier.

It was a complete clusterfuck. Both teacher and parents alike at both the elementary and the high schools all had a million reasons why it couldn’t possibly work. Since there are a limited number of buses which are shared, you can’t move one start time without moving the other.

It came up at every school event, sports practice, kids party, to the point where I would just walk away when people starting bitching about it one way or another.

The biggest issue was we had a new superintendent who wanted to “start a dialogue” about the start times rather than actually make a policy change. It took up hundreds of hours in PTO, Administrative, and Town Hall meetings and of course ended up in absolutely no change in the end. Everyone’s opinion of course had to be heard, whether it was a longer commute that a teacher would have, or then not having time to drop off their own child before getting to class, or impacting afternoon sports, or the something about the bus route, or... Of course none of the debate actually addressed if students would possible learn better from it.

I was so glad when they finally sent out the email saying they were dropping it just so that I wouldn’t have to hear the constant bickering.

It was like an engineering team with no lead and a non-technical manager arguing over what DBMS to use where no decision could be made until everyone agreed we had the “right” solution!

[+] robterrell|8 years ago|reply
It's happening where I live too. It's amazing how quickly the discussion moves past "what's best for students" and into the "it's annoying to me personally" and "when I was a kid, we suffered" conversations.
[+] candu|8 years ago|reply
A cynical explanation here would be: those in charge wanted the appearance of having considered these changes without the headache / political risk of actually changing them.
[+] Goronmon|8 years ago|reply
Of course none of the debate actually addressed if students would possible learn better from it.

Is that important if there is no way to make a different schedule work from a practical perspective?

[+] user5994461|8 years ago|reply
My campus had a rolling start of day, depending on the university that's attended.

I don't know when it was enacted but it certainly helped with congestion in the transports in the morning and in the cafeteria for lunch.

Students are autonomous though. I can imagine that school pupils are not and they cause troubles for parents.

[+] wambotron|8 years ago|reply
The school district my kids are in does this. High school starts 1 hour after elementary, and the buses just run the same routes twice.
[+] patorjk|8 years ago|reply
> night owls were especially vulnerable, many appearing so chronically jet-lagged that they were unable to perform optimally at any time of day.

I experienced this with an 8am biology class I was required to take. It wrecked my whole day. About 1/3 of the way through I just started skipping the class and then later getting notes of the lecture from a friend of mine. It ended up working dramatically well. I got an A, while my friend who got up every MWF to take the notes, got a B. It was kind of a wild result since my studying was based almost entirely on her notes. I hadn't given it too much thought, but it would make sense if being sleep deprived is what hurt her in this case.

[+] existencebox|8 years ago|reply
Anecdotally, (and as a story for anyone similar to me/with kids similar to how I was) I spent most of my life until college thinking that school/learning was the most miserable process in the world, and that I was terrible at it.

It turns out, waking up at ~6 every morning, and usually not going to bed until 10/12 thanks to after school classes and homework, left me with less sleep than I even need to be functional now as an adult and turned highschool into a special sort of "kid jail".

I got punished innumerable times for sleeping in class, and probably spent more time by % fighting to keep my eyes open than I did paying attention. (I had at least one teacher who threw chalk at students who slept, it was such a common occasion)

This changed like a lightswitch when in college I was able to assert that I didn't take any classes before 10. By the end of my masters I had a 4.0 (highschool had been a struggle to maintain a 3.0 with much easier classes), although it took most of that time to re-learn how to learn and pay attention. The difference was so stark it puts a fire in my belly just to think about the amount of resistance I've seen to changing this status quo. I recognize this is "for adults/work" but as a working adult I refuse to concede that we can't come up with a solution that doesn't so entirely steamroll some kids for being wired to need more sleep.

[+] stephen_g|8 years ago|reply
My worst semester at University I had three 8am lectures... I knew I was a bit of a night owl, but at this point I didn't realise that I actually had a severe sleep disorder. I had just assumed that what people said (you just have to be disciplined, just go to be earlier, etc.) was potentially true, which was demoralising. It was actually pretty liberating to find out about differences in circadian rhythms. I still get similar bad advice, which is about as useful as "just be happier" is to a clinically depressed person...
[+] riazrizvi|8 years ago|reply
It’s hard to go to bed earlier because of interruptions and noise levels on campus, but if they can be managed, so can this problem. The idea that there is some innate biological problem is silly IMO. Young people have no unusual difficulty adjusting to time zones when traveling, but they do have computers and cell phones that are like brain cocaine and very difficult to self manage. I started scheduling shut off times for my kids’ cell phones and magically they now get up more bright eyed and get themselves to school on time.

Though I suppose there is a self-talk component too, whereby if you convince yourself it’s an innate problem (you’re young, you’re a developer, you’re special) then it might feel more like one. I used to tell myself I couldn’t exercise in the morning, a belief I maintained into my forties, then one year I needed to, after about a month of getting used to it, I was then a morning exerciser...

[+] lostctown|8 years ago|reply
I'd say you owe that friend a round or two.
[+] otoburb|8 years ago|reply
This strategy worked well for me too until Circuit Theory. As an "early morning"[] class it was easy to bum the notes from somebody else, but the darn quizzes tanked my grades enough that I had to repeat the course the next available semester.

Before Children

[+] Balgair|8 years ago|reply
This study was done on college students, not elementary and HS students, college students at Cal. There are a lot of caveats here and trying to apply them to elementary education is good, but outside the scope.

Aside: If you really want test scores to improve, give the kids food. My SO is an educator and she's had kids come in that only get food at school. All weekend they may only eat a bag of Cheetos, sometimes up to 2/3 kids on Monday mronings. School breakfast and lunch are sometime the only food they get.

https://www.brookings.edu/blog/brown-center-chalkboard/2017/...

[+] Afton|8 years ago|reply
Agreed. Many schools (my kid's school) also provide 'weekend packs'. It's hard to know how much of that gets to the kids, but poverty is a hell of a problem.
[+] WhompingWindows|8 years ago|reply
Yes, feeding low-income students is critical. However, we have to ask if the school-lunches provided are indeed better than a bag of Cheetos? I worked in the top 3 worst middle school in my state in the poorest city in my state, and I found their school lunches to largely be processed carbs like pizza, burger+fries with no veggies. The veggies that were on offer were in tiny sauce-containers that hardly any of the kids grabbed. Furthermore, those veggies were usually carrots or cucumbers, the former of which is high in glycemic index, and the latter of which contains hardly any micronutrients. So, from a nutritional perspective, yes the calories are good for the low income students, but the food was still terrible for them overall.
[+] wpasc|8 years ago|reply
I disagree with ideas that school schedules should shift later. I am a night owl myself, but our "natural" sleep cycle certainly more or less falls in line with school times. We have fully disrupted our circadian rhythms with our lifestyles and especially screens/lights at night. Before artificial light, our sleep/wake schedule was set by the sun.

I know we live in a different world today, but I feel like shifting our schedule because of poor sleep hygiene and bad light habits is kind of reinforcing a bad habit. Whose to say that the shift wouldn't just perpetuate itself even after a shift of 1 hour later.

[+] cgriswald|8 years ago|reply
It is a mischaracterization to say this is all the result of bad habits. Asking teens and young adults to perform between 6 and 9 is like asking a fully mature adult to perform between 3 and 6.

> I am a night owl myself, but our "natural" sleep cycle certainly more or less falls in line with school times.

This is absolutely not true for adolescents continuing through young adulthood. Adolescents naturally have a delay in morning alertness levels compared to fully mature adults and other children and also have sleepiness set in more slowly/later in the evening than either other group. It is not (necessarily) poor sleep hygiene which causes teens to stay up later, but their own biological processes.

> Before artificial light, our sleep/wake schedule was set by the sun.

This seems to be an argument in favor of changing times. My highschool started at 7:10. Assuming I woke up an hour before to shower, dress, and catch the bus, that means I had to wake before the sun every day of my highschool career. The only time the sun rose earlier than 6:10 was during the summer when I didn't have school.

[+] taeric|8 years ago|reply
We used to shift our schedule pretty much daily. Outside of the equator, the night shifts pretty majorly throughout the year. And at the equator, the sun is deadly during the day. Such that our ancestors probably slept as often during the day as the did some nights.

Not to say we shouldn't work on sleep hygiene, but the myth that it is a modern crisis is misguided. Used to, people blamed caffeine. Just look for numbers to see how much more coffee used to be consumed.

All of that said, much of the difficulties in education for kids are also explainable by our bar just being higher. Much higher. But, I'd rather our methods improve. Not lowering our expectations.

[+] WhompingWindows|8 years ago|reply
Do you have any evidence to support those claims, specifically that night owl's "natural" sleep cycle falls in line with school times? There is substantial biological evidence that phenotypes for night owls vs. morning larks do actually exist. Are you suggesting it is "natural" for a night owl to be focused at 8am, which is around the average start time for the earliest classes in our education system?
[+] Symmetry|8 years ago|reply
No, changes in circadian rhythm with age are fairly constant across human societies, though we westerners do have our additional pathologies. Teenage bushmen tend to stay up later than their parents just like teenage westerners do. Making teenagers wake up earlier than younger children is just a bad idea.
[+] merinowool|8 years ago|reply
It is about meeting in the middle. I had a job when I had to be in office at 9 and it was just a nightmare, because to get on time I had to wake up early and only able to sleep 5 hours. Another job was more flexible and I was able to get in at 10. That meant over 6 hours of sleep for me. Imagine the difference between sleeping 5 hours every night or 6-7. This is a huge difference, by shifting things later by an hour. It wouldn't make a difference for morning person.
[+] Grieverheart|8 years ago|reply
During college, I used to play WoW. I think my biological clock was messed up because of it, not because that was my natural biological rhythm. Also, because of the amount of hours I put into WoW, I did not have many hours left to study, affecting my academic performance. Thus, I wonder if the performance is really linked to the biological rhythm, or rather that the biological rhythm is a sign of activities impacting academic performance.
[+] caust1c|8 years ago|reply
I'm with you there. I think the article is bullshit. We are in control of when we go to sleep, and ultimately that determines our circadian rhythm. Not some mysterious unknown force. The correlation with alcohol and drug abuse is a cause not a result.

I was very much in the camp of playing video games all night long but I didn't kid myself about early class times being the cause for my struggle.

* Disclaimer: IANA doctor/biologist. Point me to a study that says we can't control when we go to sleep (aside from other health factors including insomnia).

[+] flanbiscuit|8 years ago|reply
While I would like to agree with the article and say it's something else's fault, it's totally my own doing that I stay up late watching TV or playing games. It's not my "biological" clock keeping me up, it's the stimulus I'm getting that's keeping me up, especially with games. I'm sure if I pulled myself from a screen starting at 9pm, I'd be asleep by 10 or 11 instead of 1:30am
[+] nostromo95|8 years ago|reply
Yep, this. During summer internships in college I easily transitioned to a fully-functioning 11PM-7AM sleep schedule, but university's manifold distractions pushed me to a 2AM-10AM schedule. And in high school I was chronically exhausted because I'd stay up playing Counter Strike until 12AM every night (in retrospect this probably also limited my achievement in XC and track...). Of course this is all anecdotal.
[+] bbarn|8 years ago|reply
There's also the well documented impact of blue/led light on keeping your brain awake. You definitely get into chicken/egg scenarios with playing games all night, but having a clear screen time cut off every night helps me and my family get to sleep on time.
[+] troupe|8 years ago|reply
This is what I suspect as well. Having been a teen, it seems very likely that a later start time wouldn't help some people who would just stay up later. Now maybe not as many people would do that, but then the issue is more that they just need to turn off the lights and go to sleep earlier.

With great power comes create responsibility. Artificial light is a powerful thing when it comes to messing with natural sleep rhythms.

[+] darkkindness|8 years ago|reply
Well, the biological rhythm can be impacted by much more than just late-night activities. I'm not talking about short term things like jet lag. I'm thinking more chronic things like insomnia, chronic illness/malnutrition, emotional trauma, etc all come to mind. So it would be unfair to place all the blame on students playing WoW or partying instead of studying, for example.
[+] ngngngng|8 years ago|reply
I agree. Class could start at 10am and if you went to bed at 5am you're going to have a bad time.
[+] AStellersSeaCow|8 years ago|reply
I don't doubt that the findings are the case, I've experienced it myself and seen it in plenty others. What I would've liked to see in the paper, though, is more proof of the cause-and-effect relationship's weight here: do people who naturally stay up late get worse grades, or do people who get worse grades end up with worse sleep habits?

I'd guess there's some degree of both, but without the study being more longitudinal (eg, tracking the same population across their entire time in college to see how their grades and sleep habits relate) it's hard to say. Purely anecdotally, I've seen people who start struggling (for reasons that have nothing to do with sleep) drift into a depressive/withdrawn existence that includes insomnia and sleeping late.

[+] timerol|8 years ago|reply
Looking at the chart in the middle of the article brings up more questions than it answers. Maybe it's the weird 3D perspective, but it looks like all groups get better grades in evening classes. Furthermore, it looks like finches do better in all categories than larks, and owls always do the worst. This seems to argue against the points that the article puts forth.
[+] PebblesHD|8 years ago|reply
I’ve found these recent studies interesting in that they seem to confirm what many young people have been saying for a long time. I’ve always struggled to wake myself up of a morning and found that most classes earlier than about 10am were pretty much forgotten come end of semester. Not sure how American schools organise timetables but the two weekly cycle of class times went some way to compensate for this by changing which class was first meaning you wouldn’t fall drastically behind in one specifically because it was earliest. Things have of course changed since leaving school and my sleep patterns have changed significantly, and I can see immediately how trying to make a school student conform to such a cycle would be a poor idea, but I wonder if some time soon I’ll forget being young and start seeing the world like so many leaders seem to with no regard at all for what it was like growing up.
[+] JepZ|8 years ago|reply
> It may be time to tailor students’ class schedules to their natural biological rhythms...

Why does everybody want to change the world around them and not just adapt themselves to the world, e.g.:

'To earn better grades, students should sync their biological rhythm to their class schedules.'

While some might argue that it is not easy to do that, I would respond that such skill is invaluable for your life ahead. Granted, not every job requires such a skill, but many do.

From my own experience, I can tell that exercising discipline to go to bed early paid off for my work experience and there are few things I hate more than being tired at work: While work hours wear on, you are not getting done anything either.

[+] anotheryou|8 years ago|reply
I like how it shows that getting up early ruins the whole day.

I have to come an hour early for a meeting every other week and it's always a challenging day...

Getting up ~9am is the point at which it doesn't effect my performance anymore (I'd still prefer shifting my sleep phase even further). Sadly this only worked for a job once in my career.

[+] misterbowfinger|8 years ago|reply
original paper:

https://www.nature.com/articles/s41598-018-23044-8

abstract:

Misalignments between endogenous circadian rhythms and the built environment (i.e., social jet lag, SJL) result in learning and attention deficits. Currently, there is no way to assess the impact of SJL on learning outcomes of large populations as a response to schedule choices, let alone to assess which individuals are most negatively impacted by these choices. We analyzed two years of learning management system login events for 14,894 Northeastern Illinois University (NEIU) students to investigate the capacity of such systems as tools for mapping the impact of SJL over large populations while maintaining the ability to generate insights about individuals. Personal daily activity profiles were validated against known biological timing effects, and revealed a majority of students experience more than 30 minutes of SJL on average, with greater amplitude correlating strongly with a significant decrease in academic performance, especially in people with later apparent chronotypes. Our findings demonstrate that online records can be used to map individual- and population-level SJL, allow deep mining for patterns across demographics, and could guide schedule choices in an effort to minimize SJL’s negative impact on learning outcomes.

[+] sk1pper|8 years ago|reply
Isn’t your chronotype fairly mutable though? With some dedication and a couple weeks you can adjust to waking up whenever. Especially at college age.

Obviously lifestyle could be limiting if you’re trying to start waking up at 6am, but if you’re optimizing for GPA, then you’re gonna have to make lifestyle sacrifices anyway

[+] ada1981|8 years ago|reply
Poor Grades Tied to Class Times That Favor After School Football Practice.

Seriously, much of America is so entranced by high school football that entire district schedules are oriented around ensuring ample practice time after school.

It determines bus schedules and school start times for the entire district and all students.

[+] nemothekid|8 years ago|reply
The article doesn't support that, it doesn't make sense for a vast majority of school districts - especially inner city ones.

Another commenter made more sense - early class times give parents time before work to prepare their kids for school. This football angle is ridiculous. If it were true, wouldn't colleges and universities suffer from the same standard?

[+] monster_group|8 years ago|reply
I am more than half way through the book "Why we sleep?" by Matthew Walker and it is not a surprise to me that misalignment of circadian rhythm with class schedules results in poor grades. The book goes into great detail on the importance of getting eight hours of sleep on a regular schedule. Getting less than eight hours of sleep is tied to every imaginable disease and poor memory. I highly recommend reading the book.

https://www.amazon.com/Why-We-Sleep-Unlocking-Dreams/dp/1501...

[+] ChuckMcM|8 years ago|reply
In my experience at Intel where people were reprimanded if they weren't in the office before 8 AM I also saw bad code tied to times that didn't match the developer's biological clock :-).
[+] projektir|8 years ago|reply
Unfortunately, the summary on this issue appears to be "nobody cares". Including the parents themselves. Teenagers do not really have rights so it's going to be very hard to change this.
[+] polskibus|8 years ago|reply
I wonder if the study corrects for students that just stay up late for parties, etc., and just strip themselves of sleep when it could be avoided. It's quite easy to move your bioclock forward bit by bit, esp.for social reasons. It is very hard to roll it back (some studies suggest it's better to just roll it forward more and more instead)
[+] macmccann|8 years ago|reply
The problem in college is bad, but the problem is some high schools is even worse. At high schools without block scheduling, every day might be a 6 am alarm to get to school by 7:00.
[+] froindt|8 years ago|reply
Block scheduling was absolutely amazing, and I'm so glad I had access to it. My school did "modified block" with skinny classes (40 minutes) and blocks (85 minute). The only skinny classes were math, music, and foreign language, all of which seem to have a big benefit from going the full year. The concept of trying to do a chemistry or physics lab in 40 minutes sounded awful.

My high school ran from 8:45-3:10. Morning activities were typically 7-8 or 8:15, so you could still drop by teachers classrooms before school started.

[+] sudosteph|8 years ago|reply
6am is when the bus picked me up in highschool (start time was 7:15). Wakeup alarm was 5:15. It was awful.
[+] adam-fn|8 years ago|reply
Lewis Black [1] made this observation (with less diplomatic language) back in 2004:

    ... I flunked that course. It's not my fault.
    They taught it at 8 o'clock in the morning.
    And there is absolutely nothing that you can
    learn out of one bloodshot eye. After I flunked
    the first two tests, I grabbed the professor
    by the throat and I said, "Why are you
    teaching this **** at this ungodly hour?
    Are you *trying* to keep this stuff a secret?"
[1]: http://www.imdb.com/title/tt0414224/quotes/qt0252382