Hattingh, A. 2009. Master mathematics teachers as mentors for underperforming and disadvantaged schools. Suid-Afrikaans Tydskrif vir Natuurwetenskap en Tegnologie / <i>South African Journal of Science and Technology</i&gt;. 28, 4 (Sep. 2009), 340-354. DOI:https://doi.org/10.4102/satnt.v28i4.70.