This paper examined the outcome of growth and developmental challenges on the behavioral dispositions of in-school Christian adolescents in Nigeria. The study randomly sampled 222 respondents in Township of Kogi State, Nigeria. Six research questions and one null hypothesis was formulated to guide the study. Instrument used for data collection was questionnaire, which has 41 questionnaire items, and it covered the areas of physical, emotional, social, moral, cognitive growth and development, and the possible challenges that they could pose. Data collected was analyzed using mean and standard deviation while the null hypothesis was through the use of t-test. The findings of the study among others were that the in-school Christian adolescents have healthy physical, emotional, social and moral growth and development in spite of the challenges that accompany. But they however scored low in the area of cognitive growth and developments. Based on these, recommendations and implications for further studies were made.