Here is my contribution to Chandoo's last little dataviz challenge : How would you Visualize World Education Ranking Data
I have used Stripechart() to provide a global overview of the dispersion of the countries scores (note that the scale starts at Zero)
ScaleXY() provides a common scale and some additional info about ranking and score.
Varichart() in front of a list of countries sorted by score provides both ranking and score comparison, with the little red line showing the OECD average.
I have not used the parameter "Show Average" in Stripechart() as the supplied OECD average value does not coincide with the calculated average of all countries.