This series presents substantial results from around the globe in selected areas of educational research. The field of education is consistently on the top of priority lists of every country in the world, yet few educators are aware of the progress elsewhere. Topics discussed include teaching as integration of theory and practice; perspectives of Turkish pre-service mathematics teachers of elementary level on mathematics proofs; how effective are middle school teachers at improving student achievement; assessing teaching methods in undergraduate disciplines; motivation of German and U.S. teachers to become school principals and the art of science education.