Sentence:  Poland has made some <WSD>dramatic</WSD> gains in education in the past decade. Before 2000 half of the country's rural adults had finished only primary school. Yet international rankings now put the country's students well ahead of America's in science and maths (the strongest predictor of future earnings), even as the country spends far less per pupil. 
Meaning of the word marked with <WSD> tags:  Striking in appearance or effect.