NWOKE, B. I. Impact of Problem Solving Approach on Senior Secondary School Students’ Achievement in Mathematics. Journal of Research in Education and Society (JRES) , [S. l.], v. 6, n. 1, p. 27–33, 2015. Disponível em: http://icidr.org.ng/index.php/Jres/article/view/1418. Acesso em: 19 sep. 2024.