<![CDATA[This study aimed to examine the effect of classical guidance services on the career planning of grade XI students in the Computer and Network Engineering (TKJ) Department at SMK Negeri 1 Lintongnihuta during the 2025/2026 academic year. This study employed a quantitative approach using a quasi-experimentl method with a One-Group Pretest-Posttest Design. The participants consisted of 33 students from Class XI TKJ 1. Based on the pre-test results, 24 students were categorized as having low career planning, while 9 students were categorized as having moderate career planning. Data were collected using a career planning questionnaire consisting of 35 statement items, of which 31 were declared valid and 4 invalid. The reliability coefficient was 0.904 (very high). Data analysis used normality tests and the Wilcoxon Signed-Rank Test. Results showed a significant improvement: the mean score increased from 57.03 (pre-test) to 104.52 (post-test), an increase of 47.49 points (45.38%). Hypothesis testing showed Asymp. Sig. (2-tailed) = 0.000 < 0.05 with Z = -5.014, so Ha was accepted. Therefore, classical guidance services had a significant effect on career planning of grade XI TKJ students at SMK Negeri 1 Lintongnihuta in the 2025/2026 academic year.]]>
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