Although mathematical literacy self-efficacy (belief that one can do mathematics) is essential to success in
learning mathematics, it is not explicitly addressed in many educational institutions. The current paper used Reigeluth’s
Model of increasing achievement and self-efficacy for mathematical literacy. It is one of the educational models that
depend on the constructivist theory that contributes to helping the student to link his or her previous information with his
or her new experiences. The sample consisted of 141 male and female students in the eleventh grade from Al Nahda
School in Dhofar region, Oman. Students in the experimental group (N = 70) received instruction according to the
Reigeluth model, and students in the control group (N = 71) received instruction in the traditional way. Students
achievement and self-efficacy in mathematical literacy increased significantly more for the experimental group. There
was relationship between achievement and self-efficacy on mathematical literacy for the student sample. It is
recommended that the mathematics curriculum for all courses of education be prepared according to the Reigeluth
model, and that mathematics teachers be trained in modern models for developing the achievement and selfeffectiveness of their students’ mathematical literacy.
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