Tag: Data

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Google Chromebook: 1-to-1 Computing for $180 per Student?

Google-chrome-logo-1000 This week Google launched the Chromebook – a cloud-based "laptop" priced at $20 per month. That's $180 per student for a nine-month school year. Not a bad price for 1 to 1.

It's built on the already popular Google Chrome and Google apps platform. (I'm using both with increasing regularity).  It will be a tempting offer for schools – instant on, always connected – plus no software installs, anti-virus, or upgrades to worry about. Run it at school on the district WiFi, then take it home and use 3G – Verizon is providing 100mb of data per month for free. 

The Chromebook will raise big questions about collection of personal student data, internet security and acceptable use policies. But Google claims to have features in place which offers granular controls on web access (1st graders can't get to sites that might be acceptable to high schoolers.) 

I wonder if schools will take the bait? If I were the school IT guy – I'd be nervous. If it turns out Chromebook works as advertised, I might be out of work.

On second thought – I should get one for my mother. That's an IT job I'd like to lose!

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The Inconvenient Truth About Textbooks

School-books I just went to the iTunes App Store, and in one impulsive click, downloaded Al Gore’s companion app to his book “Our Choice: A Plan to Solve the Climate Crisis.”

It’s an immersive learning environment that begs the question – $4.99 iPad app or $49 textbook? 

Watch this promo video and you decide if the eBook has made the traditional textbook a relic. If you need some more numbers to help you make the decision -a quick search on textbook costs turned up this data from a 2005 report by the U.S. Government Accountability Office. “The average estimated cost of books and supplies for a first-time, full-time student at a four-year public institution was $898, or 26 percent of the cost of tuition and fees. At community colleges, the estimated cost of books and supplies was a whopping 72 percent of the cost of tuition and fees.” 

EBook or textbook – still trying to decide?  Don’t forget that future updates of the app could add more content or features – how about social networking?

Update: A hat tip to my friend Martin Edic at 24PageBooks who pointed out that Push Top Press (the folks who did the Gore’s book) plan to release a publishing platform for authors, publishers and artists to turn their books into interactive iPad or iPhone apps — no programming skills required. Imagine when students can make their own!

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Vermont is Yemen and Hong Kong is Egypt: A Comparative GDP Infographic Map

Us-comparatives Effective infographics enable us to see information in new ways. The Economist recently posted these two interactive maps that offer insights into the distribution of GDP and population in both the US and China. Click on maps or follow links to original maps with full functionality.  

Which countries match the GDP and population of America's states?
Original Map

 

Which countries match the GDP, population and exports of Chinese provinces? 
Original Map

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How To Quantify Culture? Explore 500 Billion Published Words With Google’s Books Ngram Viewer

By now you must be aware that Google has been busy digitizing books – over 5 million are now available for free download and search. Recently Google Labs has made public a giant database of of names, words and phrases found in those books (along with the years they appeared). It consists of the 500 billion words contained in scanned books published between 1500 and 2008 in English, French, Spanish, German, Chinese and Russian. 

Google Labs has just posted the “Books Ngram Viewer” – a free online research tool that allows you to quickly analyze the frequency of names, words and phrases -and when they appeared in the digitized books. You type in words and / or phrases (separated by comma), set the date range, and click “Search lots of books” – instantly you get the results. Note: when “smoothing” is set to “0” the results will show raw data. Using a higher number produces an average – example “4” will give you four year running averages that will more readily display trends. 

In this graph I searched “horse, carriage, canal, train, steamship, bicycle, car, airplane” and set the date range to 1800 – 2000.  Link to this transport graph at Books Ngram Viewer The results offer some insights into when these new transportation terms found their way into print. 

Transport-1

I think Books Ngram Viewer has many interesting applications in the classroom. The first that comes to mind, is as tool to introduce the research method – form hypothesis, gather and analyze data, revise hypothesis (as needed), draw conclusions, assess research methods. Working in teams students can easily pose research questions, run the data, revise and assess their research strategy. Students can quickly make and test predictions. They can then present and defend their conclusions to other classroom groups. All skills called for by the new Common Core standards.

Using the Ngram viewer, will enable students to discover many insights which will require revisions to their research strategies – a great way to explore word usage, social context and statistics. Words have multiple meanings. In my transport example “car” appears in the graph long before the advent of the automobile. Was it used as railroad car? In contrast to newspapers, events and trends take time to find their way into books. “Pearl Harbor” does not reach a peak until 1945.

The frequency of occurrence scale is important (vertical Y-axis.) If you graph a high frequency word against a low frequency word(s), the low is reduced to a flat line at the base of the scale. (Abraham Lincoln and Marilyn Monroe) Remove the high frequency (Abraham Lincoln) and re-run the graph – the low frequency (Marilyn Monroe) will appear with more detail. 

Need inspiration for nGrams? For a collection of clever searches Click here.

Updates: 

NGram Viewer has added a * wildcard feature. More on how to use it here.  Hat tip to Jean-Baptiste Michel of the nGram team who emailed me “In English, the data is good in 1800-2000, but not really before or after. Past that date, it looks like the composition of the corpus is changing; trends would indicate a shift in the corpus, not a shift in the underlying culture. So really, one shouldn’t look at data past 2000 in English.”

Analyze societal values: “ex wife, ex husband”  
 Changing laws and social values?
Watch the change in the Y-axis scale – add “my ex” to the original graph.

Ex-1

Track trends: “latte, sushi, taco”
Link to graph Are these new food fads?

Latte-1
 

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Stop Worrying About Shanghai, What PISA Test Really Tells Us About American Students

Sputnik replica
Sputnik replica

The latest results from the Program for International Student Assessment (PISA) are public, and already some pundits are declaring it “a Sputnik wake-up.” Others shout back that international comparisons aren’t valid. Rather than wade into that debate, I’d rather look more closely at the questions in the PISA test and what student responses tell us about American education. You can put international comparisons aside for that analysis. 

Are American students able to analyze, reason and communicate their ideas effectively? [Think Common Core standards] Do they have the capacity to continue learning throughout life? Have schools been forced to sacrifice creative problem solving for “adequate yearly progress” on state tests? For more on that last question see my post “As NCLB Narrows the Curriculum, Creativity Declines.” 

PISA provides some answers to those questions and offers an insight into the type of problem solving that rarely turns up American state testing. FYI: PISA is an assessment (begun in 2000) that focuses on 15-year-olds’ capabilities in reading literacy, mathematics literacy, and science literacy. PISA assesses how well prepared students are for life beyond the classroom by focusing on the application of knowledge and skills to problems with a real-life context. For more examples of PISA questions and data click here. 

Do American students learn how to sequence or simply memorize sequences

Here’s one insight into what American students can (and cannot) do that can be gleaned from the 2003 PISA test results. We spend a lot of time in school getting students to learn sequential information – timelines, progressions, life cycle of a moth, steps for how to. Typically the teacher teaches the student the sequence and the student correctly identifies the sequence for teacher on the test. Thus we treat a sequence as a ordered collection of facts to be learned, not as a thinking process for students to use.  This memorization reduces the student’s “mastery” of the chronology to lower order thinking. I was guilty of this when I first started teaching history “Can someone give me two causes and three results of WWII?” 

Sample sequencing problem from PISA

The Hobson High School library has a simple system for lending books: for staff members the loan period is 28 days, and for students the loan period is 7 days. The following is a decision tree diagram showing this simple system:

Pisa-1

The Greenwood High School has a similar, but more complex library lending system:
All publications classified as “Reserved” have a loan period of 2 days.
For books (not including magazines) that are not on the reserved list, the loan period is 28 days for staff, and 14 days for students. For magazines that are not on the reserved list, the loan period is 7 days for everyone.
Persons with any overdue items are not allowed to borrow anything. 

Task

Develop a decision tree diagram for the Greenwood High School Library system so that an automated checking system can be designed to deal with book and magazine loans at the library.  Your checking system should be as efficient as possible (i.e. it should have the least number of checking steps). Note that each checking step should have only two outcomes and the outcomes should be labeled appropriately (e.g. “Yes” and “No”).

Student Results

Only 13.5% of US students were able correctly answered the question. Does it really matter if students in Shanghai did any better? (The student results were rated on a rubric scale.) 

When students are asked to observe a process and develop a sequence they have an opportunity to use a full spectrum of higher-order thinking skills – they must recognize patterns (analyze), determine causality (evaluate) and then decide how they would communicate what they’ve learned to others (create). Sequencing can be taught across the curriculum at a variety of grade levels – we simply have to ask the students to observe and do the thinking.

In case you’re wondering,  correct response should look like this.
Click image to enlarge.

pisa answer
pisa answer 
 

Image credit/ NASA