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Recent second and third order finite difference schemes for the computation of weak solution of hyperbolic conservation laws are modified resulting in methods for stiff or non-stiff systems. The modified schemes also fall in the class of central schemes, all of which can be viewed as based on the well-known Lax-Friedrichs (LxF) schemes. The schemes are Riemann-solver free high resolution schemes and therefore not tied to any Eigen- structure of the problem. They can be implemented in a straight forward manner as black-box solvers for general conservation laws and related...

The use of web based learning in primary schools, especially in South Africa, has been neglected to a large degree. There are various reasons for this including lack of resources and qualified personnel. The aim of this book was the design of a hybrid web based learning model for primary school mathematics especially in the teaching and learning of perimeter and area. Mathematics was chosen as a focus area because of the poor results attained by learners and university students in this subject. The introduction of networked computer laboratories to previously disadvantaged South African...

The research was based on the idea that a clear understanding of the relationship between 2D and 3D geometry has proven to be an invaluable aid for future math learning. Currently, learners have little exposure to hands-on methods for understanding these relationships. Textbooks are 2D representations of 3D concepts. This research project is a classroom experience designed around the use of technology for primary school geometry. It is based on the belief that learner build understandings through iterating, learning and doing. They need scaffolding to build upon prior knowledge, to build new...