<![CDATA[This study aims to improve students’ confidence and learning achievement in the subject of Sequences and Series through the Problem-Based Learning (PBL) model using AI-assisted worksheets. In this study, AI-assisted worksheets were utilized to present mathematical problems, provide hints, and offer instant feedback to students as they worked through the material. This study was conducted in two cycles, each comprising four components: planning, acting, observing, and reflecting. The subjects of this study were students of class X 6 at SMA Negeri 1 Bambanglipuro in the 2025/2026 academic year. The data collection techniques used in this study were teacher observation sheets, student observation sheets, student self-confidence questionnaires, and student learning achievement tests. Data analysis included data presentation and conclusion drawing. The results indicate that the use of the problem-based learning model with AI-assisted worksheets is able to increase student self-confidence, as evident from the data in cycle II, which achieved the success indicator: 36.67% of students had very high self-confidence, and 63.33% had high self-confidence. Additionally, this learning model improved student learning achievement, as cycle II results reached a success indicator of 76.67%, meaning that 23 out of 30 students had completed the course. Observations of the problem-based learning model using AI-assisted worksheets in cycle II also achieved the success indicator with a percentage of 95.94%. Overall, the research results indicate that problem-based learning using AI-assisted worksheets can increase students' confidence and learning achievement. Keywords: Problem-Based Learning; Student Worksheets; Artificial Intelligence.]]>
