| 23 | 23th LS(230919) Modulus Function (PDF 343) | jp Park  | 2023-09-19 | 0 |
| 22 | 22th LS(230912) Composite Function | jp Park | 2023-09-12 | 0 |
| 21 | 21th LS(230829) Formula by Induction (PDF 320) | jp Park | 2023-08-29 | 0 |
| 20 | 20th LS(230822) Conditional Probability (PDF 292 #2) | jp Park | 2023-08-22 | 0 |
| 19 | 19th LS(230815) Compound Probability (PDF 283) | jp Park | 2023-08-15 | 0 |
| 18 | 18th LS(230808) Simple Trigonometry Expression (PDF 266) | jp Park | 2023-08-08 | 0 |
| 17 | 17th LS(230801) Trigonometry Identity (PDF 262) | jp Park | 2023-08-01 | 2 |
| 16 | 16th LS(230725) Sine and cosine Law (PDF 255) | jp Park | 2023-07-25 | 0 |
| 15 | 15th LS(230718) Trigonometry (PDF 246) | jp Park | 2023-07-18 | 0 |
| 14 | 14th LS(230711) Quadratic Formula (PDF 233) | jp Park | 2023-07-11 | 0 |
| 13 | 13th LS(230705) Quadratic Equations (PDF 227) | jp Park | 2023-07-05 | 0 |
| 12 | 12th LS(230606) Dilation (PDF 167) | jp Park | 2023-06-06 | 0 |
| 11 | 11th LS(230530) Transformation (PDF 161) | jp Park | 2023-05-30 | 0 |
| 10 | 10th LS(230523) Triangle Congruence (PDF 146) | jp Park | 2023-05-23 | 0 |
| 9 | 9th LS(230509) Coordinate Geometry 연습문제 (PDF 132) | jp Park | 2023-05-09 | 0 |
| 8 | 8th LS(230502) 3D Coordinate Geometry (PDF 130) | jp Park | 2023-05-02 | 0 |
| 7 | 7th LS(230420) Line Equation (PDF 123) | jp Park | 2023-04-20 | 0 |
| 6 | 6th LS(230411) Gradient (PDF 117) | jp Park | 2023-04-11 | 0 |
| 5 | 5th LS(230328) 피타고라스의 정리 (PDF 107) | jp Park | 2023-03-28 | 2 |
| 4 | 4th LS(230321) Rounding (PDF 92) | jp Park | 2023-03-21 | 2 |
