Yusuf, Sabiru Dahiru. “Effects of Collaborative Learning on Chemistry Students’ Academic Achievement and Anxiety Level in Balancing Chemical Equations in Secondary School in Katsina Metropolis, Nigeria”. Journal of Education and Vocational Research 5, no. 2 (June 30, 2014): pp. 43-48. Accessed November 23, 2024. https://ojs.amhinternational.com/index.php/jevr/article/view/151.