00376nam a2200121Ia 4500008004100000040001600041041001200057082001200069100002000081245013300101260000900234300001100243230917s9999||||xx |||||||||||||| ||und||  e96400aMAIN  aEnglish  a370 Y1E  aYadav, Sharmila 0aEffect of mastery learning strategy on pupils achievement in mathematics at primary level and their attitude towards mathematics  c1999  a101 p.