'Bang for your buck' means 'value
for the money spent' or 'excitement for the money spent' and is
based on the slang meaning of bang (excitement ) and buck (money).
Finland had one of the highest-ranked education system for many
years, but came in #2 in 2013, behind to Japan. The UK #3 in 2013;
Canada #7; Estonia #17 and the United States #18, out of 200
countries considered.
Japan spends an average of $10,596 per student and Finland $10,157.
The US spends $15,172 per student, the highest of any country and
2.5 times more per student than #17 ranked Estonia. The US does
not appear to be getting a bang for its bucks.