The study analysed the performance of students in three public and four private senior secondary schools within Giwa Education Zone, Kaduna State, Nigeria between 2010-2014. Analysis was carried out on specific subjects including, English Language, Mathematics, Arts subjects, social science subjects, science subjects and vocational subjects. In order to analyze the data, the Kruskal-Wallis's Non parametric statistics method was used as it compared the mean achievement of the subject/subject groups in the schools and various years. Relevant literatures were reviewed using theory of performance as theoretical framework. Six hypotheses were tested using t-test statistical analysis at 0.05 level of significance. Also, the study was designed along the line of an ex-post factor and descriptive survey. Data analysis and presentation was done using descriptive statistics with tables. In respect to the performance of students within the period of the study presented in table 3, which shows the performance level of students in the five years under study, their mean performance ranking were 194.2, 165.6, 151.5, 159.17 and 195.3 for year 2010, 2011, 2012, 2013 and 2014 respectively. This shows that year 2014 with mean ranking of 195.3 had the best SSCE performance in English Language while year 2012 with mean ranking of 151.5 had the least performance in English language ranking. Findings showed that year 2012 with mean ranking of 185.86 had the best SSCE performance in mathematics while year 2010 with mean ranking of 145.8 had the least performance in mathematics. In view of these findings, it was recommended that Government should constitute monitoring team that will ensure the teaching of English language and provision of language laboratory, mathematics subject should be taught only by qualified and experienced teachers, vocational subjects attracts modern, facilities to mention among others.