Welcome to Ndola, I hope that this post will still be able to help you, as has been said Ndola is really a laid back town very friendly it's a great place to raise a family. You can get to most parts of Zambia in less than a day.
Simba School is an international school that uses the IGCSE curriculum (British based) with A-levels also offered in the 6th form. Facilities are well maintained they have a large library, labs, swimming pool and various sports fields. The teaching staff is predominantly expropriate with some Zambian trained teachers.
Fees are determined by grade level and generally you pay more are the higher the grade. You will have to contact them directly for the enrollment requirements simbaschool.com/index.php.
Good Luck