Hypocrisy (hipocrisia)

18 Oct 2016 / Leonardo Barichello

(Português) Tirinha adaptada de www.malvados.com.br/index1162.html. Gostou? Leia mais em malvados.com.br.


(English) Comic strip adapted from http://www.malvados.com.br/index1162.html. Enjoyed? Read more at malvados.com.br (in Portuguese).


Linear number board games and low income young children’s numerical knowledge

21 Sep 2016 / Leonardo Barichello

The paper Promoting Broad and Stable Improvements in Low-Income Children’s Numerical Knowledge Through Playing Number Board Games explores the effect of playing linear number board games in young children’s numerical knowledge paying particular attention to the socio-economical status of the children.

The paper reports two experiments. The design of the first study is pretty straight forward: experimental design (randomized controlled trial) with a control group (playing a similar game with colours instead of numbers) taking into account age, achievement in a pre-test and socio-economic status as dependent variables and achievement in a post-test and delayed post-test as independent variables. The conclusion is that playing the linear number board games for as little as 1 hour (divided into 5 sessions) affected positively the results in the post-tests and these results remained statistically relevant after 9 weeks.

The second study had a different aim: investigate the correlation between playing linear number board games at home and results in the pre-test. The motivation behind this study is related to the perception that low-income students have less experience with some sort of activities at home that could affect positively their learning (such as linear number board games, as shown by the first study). The data came from the pre-test of the first study and from a self-report from the students considering some popular games for children. The authors confirmed the positive effect: students that reported playing games that could be considered a linear number board game presented higher scores in the pre-test.

The authors synthesizes their conclusion as follows:

All these findings converged on two conclusions. First, differing experience with board games is one source of the gap between the numerical knowledge of children from more and less affluent backgrounds when they enter school. Second, this gap can be reduced by providing children from low-income backgrounds experience playing number board games.

My questions would be:

  • Why linear number board games are not being widely adopted in pre-schools?
  • Why nobody is trying to replicate the results in different contexts?

In my opinion, this seems to be a study very replicable and with a great potential to impact classroom practices with relatively low costs. Therefore, it is hard to understand why it does not receive more attention from the academic community.


Ramani, Geetha B., and Siegler, Robert S. . "Promoting broad and stable improvements in low‐income children’s numerical knowledge through playing number board games". Child development 79.2 (2008).

Changing the font size for all equations in LibreOffice Writer

01 Jul 2016 / Leonardo Barichello

It is annoying to change the font size of equations in a LibreOffice document when you have to do it for a lot of equations because they are not affected by the size of the text. One way of doing this is with the macro below (I got it from superuser.com/questions/290197/how-to-change-the-font-of-all-equations-in-libreoffice-writer).

Sub FormulaFontSizeChanger
    f = InputBox("New font size:", "BaseFontHeight", 9)
    o = ThisComponent.getEmbeddedObjects()
    For i = 0 to o.count-1
        if (not IsNull(o(i))) and (not IsNull(o(i).Model)) then
            o(i).Model.BaseFontHeight = f
            o(i).Component.BaseFontHeight = f
    Next i
End Sub

To use it on LibreOffice Writer go to menu Tools → Macro → Organize Macros → LibreOffice Basic. Then, click Organizer and New... Paste the code above and save. Your macro is created. Now, menu Tools → Macro → Run Macro and find it.

begin ... prev 1 2 3 4 5 6 7 8 9 10 11 12 next ... end



english português música poesia coffee Ireland mathematics education café music movie opinion duas versões two versions research methodology recipe política matemática opinião nottingham visualization linux food educação programação receita comida viagem arte educação matemática beer libreoffice amsterdam pesquisa free software video vídeo