The effects of mastery learning and improved materials on English achievement levels for ninth grade Turkish students at a private high school

Graduate Program in Educational SCiences.Yıldıran-Stodolsky, Güzver.Eğinlioğlu, Uğur.2023-03-162023-03-161985.ED 1985 Eg4https://digitalarchive.library.bogazici.edu.tr/handle/123456789/1603830 cm.Mastery learning.The effects of mastery learning and improved materials on English achievement levels for ninth grade Turkish students at a private high schoolxi, 118 leaves;