I have 50 years of experience in teaching mathematics and science to GCSE and chemistry to A level. I am a professor Emeritus at the University of the Witwatersrand, Johannesburg, where I work with teachers.
I have 50 years of experience in teaching mathematics and science to GCSE and chemistry to A level. I am a professor Emeritus at the University of the Witwatersrand, Johannesburg, where I work with teachers.