Cobbinah , A. 2017. Comparative effects of critical thinking and peer-assessment skills training on Ghanaian senior high school students’ achievement in mathematics: Comparative effects of critical thinking and peer-assessment skills training on Ghanaian senior high school students’ achievement in mathematics. Ghana Journal of Education: Issues and Practice (GJE). 4, (Dec. 2017), 77–88. DOI:https://doi.org/10.47963/gje.v4i.496.