In this letter to Dr Andreas Schleicher, director of the OECD’s Programme for International Student Assessment, academics from around the world express deep concern about the impact of Pisa tests and call for a halt to the next round of testing. www.theguardian.com
Category Archives: English
posts in English
Grand Seiko Self-Dater Inspiration with Spring Drive Technology
It’s really nice, a must-have for all Spring-Drive fans: 
The only drawback is the price: around €32’000.
The SBGA103, with a price tag of around € 6050, is a more realistic attempt to possess such a beauty:
Plot graphs online with fooplot.com
I found the page http://fooplot.com which plots nice function graphs in a fast and easy way. You might define the range for the input variable x as well as for the output y, and you can plot different function graphs on the same window with different colours. The following screenshot is from an example with a fitting curve and two interpolations.
Prisoners’ dilemma: Would you confess?
Watch this video from Khan Academy.
What do prime numbers have to do with hurricanes?
Watch this video from Khan Academy.
Can you make an unbreakable code using dice?
Watch this video from Khan Academy.
Bulk convert with ImageMagick
The following might be useful if you scan some images and want to convert between formats.
Use mogrify from the ImageMagick package in order to convert more than one image at once from one format to another.
From PDF to JPG:
mogrify -format jpg -quality 80 -density 300 *.pdf
From JPG back to PDF:
mogrify -format pdf *.jpg
How to change a light bulb
Step by step instructions based on personal experiences. Enjoy the 2:23 minutes video.
Watch more instructions around electricity on Mehdi Sadaghdar’s YouTube channel.
How did the Allies crack Hitler’s secret codes?
Watch this 10-minutes Video from KhanAcademy.
The Teacher’s Cheat Sheet For Edmodo
I’d like to share a powerful cheat sheet for Edmodo that I stumbled across today. It’s available on Google Drive right now but I’ve embedded it below to make your life a little bit easier. www.edudemic.com