Development of C++ Application Program for Solving Quadratic Equation in Elementary School in Nigeria.
The study was conducted to design, develop and test a c++ application program CAP-QUAD for solving quadratic equation in elementary school in Nigeria. The package was developed in c++ using object-oriented programming language, other computer program that were also utilized during the development process is Dev-C++ compiler, it was  used for compile, run and debug the program. The descriptive research design of survey type was adopted specifically, the one group post-test design, it was simple random sampling technique. The CAP-QUAD package was tested on 20 students from Ola-oluwa Muslim Grammar School Ado-Ekiti, Ekiti State, Nigeria on individual learning which formed the sampled of the study. Two set of instruments were use to collect data for the study, they are Quadratic Equation Assessment Test (QAT) and researcher-developed Questionnaire. The two instruments were subjected to face and content validity by test and measurement expert. The reliability coefficient for QAT using kuder-richardson was 0.78. The test re-test method of reliability was used to determine the reliability coefficient of the Questionnaire which stood at 0.81. The data were analysed using mean and percentage scores. The study revealed the performance level of students when exposed to use CAP-QUAD is very high which is excellent. The result further showed that students opinion and impression concern the package is positive while most of the students prefer to use the package and suggest to friends to used. In view of the implication of findings, it was recommend that research into the design and development of computer educational packages and utilization into the classroom should be encourage, while computer package like MATLAB and others should providing in all other subject. Keywords: Application program, Quadratic Equation, Elementary School, Development