Research and questionnaire results have produced new quantities of relationships between extra-curricular activities and an individual's academic performance. A lot of information was obtained that was not originally foreseen. This study was designed simply to investigate the effects that extracurricular activities have on an individual's academic performance. By returning the questionnaires I was able to analyze the results and gain further understanding of the modern adolescent in South Africa. It was also observed how and how they view an extracurricular activity and how important extracurricular activities are among adolescents in a private school in Johannesburg South Africa. The results of my study have made an addition to the research on this particular topic. After careful investigation and analysis of the results, the researcher is able to deduce the averages for all the numerical data. The numerical data should consist of the average of both the hours spent in extracurricular activities per week and the previous year's grades for participants in each year, this will help provide an accurate conclusion. With the data in Table 1 various patterns and differences can be observed. We can simply see that with more hours spent in an average week participating in extracurricular activities participants had a higher score in the previous year. This finding in my study is directly related to that of Holland and Andre (1987). The connection between this study and the study conducted by Holland and Andre both identify that participation in extracurricular activities improves a person's academic performance and academic aspirations. Essentially, extracurricular activities helped improve an individual's academic performance... by the middle of the paper... or not. (Eccles, Barber, Stone, Hunt, 2003). This may lead to the observation that the annual average of a senior student with a large workload may not see a noticeable improvement in academic performance due to greater stress than a junior. high-level student. However, despite this observation, my study showed that people who participated in many and varied extracurricular activities actually performed better than those who did not: regardless of the workload in a high school. The above observation can also be linked to the study done by Stephens and Schaben (2002): In the study done by Stephens and Schaben there is an observation that regardless of gender, an individual who participates in an extracurricular activity will always perform better (academically) than an individual who does not participate in an extracurricular activity.