Lasco, Maris, and Nelia Raganas. “Performance–Based Learning Experiences and Achievement of Grade VII Freshmen in Elementary Algebra 1: Effective Inputs for the Enhancement of the K-12 Teaching Guide”. Annals of Studies in Science and Humanities, vol. 2, no. 2, Dec. 2016, pp. 47-53, https://journals.carsu.edu.ph/jASSH/article/view/102.