Category Archives: Education

Transit of Venus

A rare transit of venus is happening on coming wednesday this week. The planet Venus moves across the sun visible as a small dot. Centuries ago this event was observed to calculate the distance earth-sun to be able to calculate for instance the longitude of a ship’s position while navigating on the ocean. The next transit of venus will be in december 2117, so last chance for most of us.

More info: wikipedia


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The Netherlands from above

A Dutch project called Nederland van Boven (Netherlands from above) shows beautiful interactive maps and visualizations.

The making of video on YouTube is particularly beautiful:

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Filed under Education, Environment, traffic, Uncategorized

Data visualisation – design competition by

There is still a week left in a design competition by It started with a Tweet by information designer David McCandless on data about black students at Oxford and other UK universities.

See the details of the competition here.

A post on the guardian’s datablog was also inspired by this data.

Here is a video of a TED talk by David McCandless on data visualisation:


I had a look at the data and the links provided on the competition website and have come up with some visualisations of relations in the data that seemed most interesting to me:


Popular JAC2 subject groups in 2010 by white applicants aged 20 and younger

Popular JAC2 subject groups in 2010 by black applicants aged 20 and younger:

Data Sources:

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Referendum about school reform – class struggle in Hamburg?

The recent referendum in Hamburg reveals some interesting coherences. Subject was a school reform that aimed at a letting students learn together at the same school till 6th grade. And then split up into two different kinds of secondary schools (Gymnasium and Stadtteilschule). Till now it is common in Germany to seperate the kids after 4th grade. They then go to either Gymnasium (aiming at a higher education entrance qualification) or lower level schools like Realschule or Hauptschule. It is often critized that to some extend a social segregation goes in hand with this educational system. Indeed children from the upper class tend to achieve a university entrance qualification significantly more often than children from the working class. The reform aimed at attenuating this effect. However in Hamburg an obscure parents initiative has formed with the goal to prevent the reform. They don’t lay open who supports them with money of which they have enough to run an effective PR campaign that brought a successful result at the end since the reform was rejected by the voters at the end. This leads to questioning the sense of such a basic democratic referendum when there are opinions and interests that are powerful enough to run a campaing while others are not.

The referendum was meant for the benefit of the lower class whose children might profit from a longer learning together at elementary school. But surprisingly the lower class did not participate much in the referendum. Looking at the maps of the voter turnout and comparing them to a map that reflects the social situation in Hamburg it is striking that the districts with the highest voter turnout are congruent with those with the highest average income. Or, the districts with the lowest voter turnout are the ones with the highest share of inhabitants receiving welfare aid. The amount of schoolchilds living in a district, although they were the main subject of the referendum, did not correlate with the voter turnout.

Some people are talking about a class struggle. One might get to this conclusion considering the circumstances. But one should also not forget that this referendum reveals the absurdity of the German educational system where every federal state can make its own laws. And some federal states are very small (Hamburg for instance is just the city itsself – a city state so to say). Some middle class families might have voted against the reform simply because they would not like to be confronted with a different school system should they move to the suburbs one day.

Voter turnout in % in Hamburg districts

Average income in € per tax payer in Hamburg districts

Share in % of receivers of welfare aid according to SGB II

schoolchildren in Hamburg districts

Hamburg districts; Source: Wikimedia Commons User: TUBS

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Filed under Education, Politics