Posts Tagged education
Online courses attracting cheaters?
According to the authors of the recently published statistical study “No More Excuses-Personality Traits and Academic Dishonesty in Online Courses” (Journal of Statistical Science and Application, V2 (2014) 111-118) cheaters now run rampant across most college campuses. With the number of undergrads taking classes online—4.3 million and growing fast, opportunities for academic dishonesty are expanding. Surprisingly, this experiment showed less cheating in the virtual than in the traditional classroom settings; indicative, perhaps, of those going online being more motivated to learn, rather than just achieving credits. This is good to see. Also, I was happy to learn that this and other similar studies found Americans being less accepting of cheaters and applying higher standards for honesty than most other nationalities. Along those lines, US News and World Reports in this June posting advises students to “Think Twice Before Cheating in Online Courses,” particularly when being proctored by webcam. The lady pictured with a cheat-sheet written on her arm might never get the chance to roll up a sleeve. That’s just too bad.
Oh, oh—sociology professors say that “most of what we do for our kids at schools doesn’t matter”
Read this New York Times essay on why Parental Involvement Is Overrated and weep for all the time you spent helping your child become well-educated. It doesn’t help that
“most parents appear to be ineffective at helping their children at homework.”
Many a time my kids asked me to help them do math, which I really dreaded—not because I could not come up with the answer, but due to the constantly-changing way schools taught it. After being told many times that I got the right answer the wrong way and thus provided absolutely no help, I began bearing down on studying the latest-and-greatest math book first before working out the problem.
By the way, I made the student go through the materials with me—that made this an effective approach for parental mentoring, or so I thought. Now I wonder if I should’ve even bothered.
However, one time one of my daughters did say that my way of explaining a puzzling math problem made a lot more sense the either the teacher or the book. That’s one time out of hundred other times that my good deeds did not go unpunished, but like the single outstanding golf shot out of hundred bad ones in any-given round, I remember this fondly. 🙂
Kids & Science
Posted by mark in pop, science, Uncategorized on June 23, 2013
I am heartened to hear of great work being done by current and former colleagues to get K-12 kids involved in Science, Technology, Engineering, and Mathematics (STEM). For example, Columbia Academy, a middle school (grades 6-8) in Columbia Heights (just north of Minneapolis), held an Engineering and Science Fair last month where two of our consultants, Pat Whitcomb and Brooks Henderson, joined a score of other professional engineers who reviewed student projects. Winners will present their projects this summer at the University of Minnesota’s STEM Colloquium.
Also, I ran across a fellow I worked with at General Mills years ago who volunteers his time to teach middle-schoolers around the Twin Cities an appreciation for chemistry. He makes use of the American Chemical Society (ACS) “Kids & Chemistry” program, which offers complete instructions and worksheets for many great experiments at middle-school level. Follow this link to discover:
– Chemistry’s Rainbow: “Interpret color changes like a scientist as you create acid and base solutions, neutralize them, and observe a colorful chemical reaction.”
– Jiggle Gels: “Measure with purpose and cause exciting physical changes as you investigate the baby diaper polymer,* place a super-absorbing dinosaur toy in water, and make slime.”
– What’s New, CO2? “Combine chemicals and explore the invisible gas produced to discover how self-inflating balloons work.”
– Several other intriguing activities contributed by ACS members.
Kudos to all scientists, engineers, mathematician/statisticians who are engaging kids in STEM!
*(The super-slurpers invented by the diaper chemists really are quite amazing as I’ve learned from semi-quantitative measurements of weight before and after soakings by my grandson. Thank goodness! Check out this video by “Professor Bunsen”, which includes a trick to recover the liquids that I am not going to try.)
Educational system turned upside down by distance-based learning
Posted by mark in design of experiments, pop on April 14, 2013
I’ve been watching with interest the trend for ‘flipping’ classrooms; that is, using time together for working on homework and leaving the teaching to web-based and other materials (books, still!) for students to teach themselves on their own time. At the college level this new educational approach for is gaining momentum via massive open online courses, called MOOCS.
For example University of Minnesota chemistry professor Chris Cramer will teach this 9-week MOOC on Statistical Molecular Thermodynamics starting next month. Follow the link and watch him demonstrate a thermite reaction. If anyone can make statistical molecular thermodynamics interesting, it will be him, I think, so I enrolled. It’s free, thus there’s nothing to lose. Also, I still feel guilty about getting an A grade in the stat thermo class I took 30 years ago—the reason being it was graded on a curve and thus my abysmal final score of 15 out of 100 got rated highly as the second highest in my class. As you can infer, it was not taught very well!
P.S. I recently unveiled a distance-based lecture series on design of experiments called the DOE Launch Pad. It augments my book (co-authored by Pat Whitcomb) on DOE Simplified. Contact me at mark @ statease .com to sign up. It’s free for now while in pilot stage.
Time to lighten up on homework?
Posted by mark in pop, Uncategorized on October 21, 2012
The Wall Street Journal’s Market Watch this Friday posted the data shown in this chart. For the 11 countries shown** you can see why WSJ seconds the call by French President Hollande to ban all homework.
Students would party hearty but this laissez-faire approach will not fly with those blessed with ambitious parents. Nevertheless the call for less homework, fueled by new data from the National Center for Education Statistics, reinforces other studies going back at least a decade.
It will be interesting to see what emerges as a consensus for a the happy medium on amount of homework assigned. Four hours per night seems way too much, especially at the 8th grade level.
Meta-analysis of hundreds of studies done on the effects of homework shows that the evidence supporting the practice is, at best, modest. Homework seems to be most useful in high school and for subjects like math. At the elementary school level homework seems to be of marginal or no academic value.
– Malcolm Gladwell
*See the report here
**I took out Saudi Arabia, whose result of 34% below average, given 11% being assigned over 4 hours of homework per night, fell far below even these very off-putting predictions–an outlier statistically.
Acknowledgment: Thanks to Devan Govender for alerting me to this issue.
How to better your brain to make it think and retain
Buried in my file of fodder for blogs I re-discovered a heads-up from the New York Times on 1/21/11 that giving yourself a quick quiz after studying something once works better than going over and over it. The test-triggered active retrieval promoted meaningful learning by half in terms of how much students remembered a week later.
If you know something, or if you have stored information about an event from the distant past, and never use that information, never think of it, your brain is functionally equivalent to that of an otherwise identical brain that does not “contain” that information.
— Cognitive neuroscientist Endel Tulving quoted in this publication in Current Directions in Psychological Science of research on active retrieval by Jeffrey D. Karpicke of Purdue University
Coincidentally I just read this passage in “Brenner and God” by Wolf Haas, three time winner of the German Thriller Prize, which struck a chord about how the mind works in mysterious ways: “…just like a light that’s too bright can be bad for the eyes, so, too, can a mind that’s too awake be not at all good for thoughts…a half-asleep person can always outmatch an awake person by a long shot, no discussion.”
This happens with me when I am really wrapped up in a writing project or dealing with a very tough problem. Then I cannot sleep well as thoughts keep winding through my head. Often as I am nearly into a dream an answer comes to me. Then the only thing is to get up and write it down in the hopes that next morning it still makes sense. In any case, if I do not make a note, I then cannot sleep for fear of forgetting it. But surprisingly these ideas do usually hold up to the light of day, albeit not always terribly brilliant.
Does this happen to you too?
The next bubble that’s bound to burst: college tuition
I am glad to have graduated the youngest of my 5 children—now self-sustaining in Ohio State University’s biochemistry PhD program. Even taxpayer-subsidized state-school students like her can easily pile up $10,000s in debt for ever-growing tuition. Those going to private institutions are likely to end up with a lot more money to pay back after they complete their studies.
One year ago my high-school classmate Mark Perry, now a professor of economics and finance in the School of Management at the Flint campus of the University of Michigan, warned about a Higher Education Bubble. Under the bombshell blurb “That’s a jump of 1,120%” [from cost of college in 1978], the latest (August 27) issue of Bloomberg Businessweek extends the Bureau of Labor Statistics in Perry’s scary chart to 2012. Given what happened in housing, this is becoming extremely alarming!
Students are paying less and less of direct college costs, relying more on government grants and loans. That has encouraged universities to jack up tuition expenses, fueling a vicious circle reminiscent of the housing bubble.
– David Hogberg, Investors Business Daily
A more graphic illustration is provided via this glimpse at a Broadside by Glenn Reynolds. View his video and weep if you have children heading for college. It’s hard to imagine that this can go on (graduates paying many $100s per month for debt) for much longer. The meager educational-returns on massive investments (loaded into huge debts) just do not seem sustainable.
Polysci prof asks “Is Algebra Necessary”?
Posted by mark in pop, Uncategorized on July 29, 2012
I was appalled to see this titular question on the front of today’s (Sunday) New York Times opinion section. It came along with this sidebar quote:
There is no good reason to force students to master quadratic equations. Doing so holds them back.
That really riles me up, seeing as how these polynomials work so well for response surface methods (RSM) for process optimization. The author, Andrew Hacker–emeritus professor of political science at City University of New York, believes that, by making math mandatory, our educational system filters out talented scholars. As an alternative to hard-core number-crunching, he proposes the “exciting courses” in ‘citizen statistics’ such as the Consumer Price Index. His aim is “to treat mathematics as a liberal art, making it as accessible and welcoming as sculpture or ballet.”
I enjoy seeing statues and I admire the grace and athleticism of dancers; however, Hacker’s vision is for me dystopian. But so long as the educational system provides for a branching of those who like math versus the others who do not, then we get the best of all worlds. I agree–let’s not force algebra on those who abhor it.
Blended learning for math & stats
Posted by mark in Basic stats & math on September 18, 2011
Check out this intriguing YouTube video by Khan Academy proving the Pythagorean Theorem:
Now imagine grade schoolers being lectured like this at home and then spending their time in class following up one-on-one or in small group sessions with the teacher. See this report from a 7th grade math teacher in California who takes advantage of this “blended learning” approach. As face-to-face time with educators becomes ever-more expensive, expect more-and-more use of asynchronous web-based training like this. That’s what I foresee. Don’t you?
Video of paper-helicopter fly-offs at South Dakota School of Mines & Technology
Posted by mark in design of experiments on May 10, 2011
Stat-Ease Consultant Brooks Henderson produced this video — it’s quite impressive!
For background on the paper helicopter experiment, see this previous StatsMadeEasy post.