卡通风学习办公文具证书图标元素

Flat pixel art exam tool icons on white background, pure mosaic style with no cartoon faces, pixel exam paper with printed questions and answer lines, answer sheet with bubble circles and pencil marks, test booklet with multiple pages and staple, calculator for exams with solar panel, timer clock for timed tests with red display, grade book with student names and scores, report card with grades and comments, diploma with scroll and ribbon, certificate with gold seal and border, nine icons evenly distributed in three rows and three columns, clean geometric pixel shapes with exam paper white and red grading palette, no facial expressions, pure assessment representation.