| 39 | 39th LS(220613) Independent Probability (PDF 301) | jp park  | 2022-06-13 | 1 |
| 38 | 38th LS(220608) Sine, cosine rule (PDF 272) | jp park | 2022-06-09 | 2 |
| 37 | 37th LS(220601) Ch.12 Bearing (PDF 255) | jp park | 2022-06-01 | 4 |
| 36 | 36th LS(220530) Ch.9 Statistics (PDF 180) | jp park | 2022-05-30 | 2 |
| 35 | 35th LS(220525) Ch.5 Functions (PDF 183) | jp park | 2022-05-25 | 3 |
| 34 | 34th LS(220523) Ch.3 Quadratic Equations (PDF 134) | jp park | 2022-05-23 | 4 |
| 33 | 33th LS(220518) Ch.6 Coordinate Geometry (PDF 130) | jp park | 2022-05-18 | 1 |
| 32 | 32th LS(220516) Ch.2 Sets and Venn Diagram (PDF 36) | jp park | 2022-05-16 | 2 |
| 31 | 31th LS(220511) Ch.25 Non-right angled Triangle Trigonometry.. | jp park | 2022-05-11 | 3 |
| 30 | 30th LS(220509) Ch.24 Deductive Geometry (PDF 489) | jp park | 2022-05-09 | 1 |
| 29 | 29th LS(220504) Ch.22 Other Function (PDF 449) | jp park | 2022-05-04 | 2 |
| 28 | 28th LS(220502) Ch.20 Tree Diagram and Binomial Probabilitie.. | jp park | 2022-05-02 | 1 |
| 27 | 27th LS(220422) Ch. 17 Simultaneous Eqs (PDF 365) | jp park | 2022-04-23 | 2 |
| 26 | 26th LS(220418) Ch. 11 Financial Mathematics Loan (PDF 265) | jp park | 2022-04-18 | 1 |
| 25 | 25th LS(220413) Ch. 11 Financial Mathematics (PDF 253) | jp park | 2022-04-13 | 3 |
| 24 | 24th LS(220406) 11.5 Choosing Data Display (PDF 625) | jp park | 2022-04-06 | 2 |
| 23 | 23th LS(220405) 11.4 Two Way table (PDF 616) | jp park | 2022-04-05 | 1 |
| 22 | 22th LS(220330) 11.1 Measure of Center and Variations (PDF 5.. | jp park | 2022-03-30 | 2 |
| 21 | 21th LS(220328) 10.3 Radical Equations (PDF 567) | jp park | 2022-03-28 | 2 |
| 20 | 20th LS(220325) 9.6 Nonlinear System Eqs (PDF 535) | jp park | 2022-03-27 | 2 |
