| 45 | 45th LS(210822) Radicals (PDF P94) | Jp Park  | 2021-08-22 | 0 |
| 44 | 44th LS(210729) Exponential Eqs (PDF P62) | Jp Park | 2021-07-30 | 0 |
| 43 | 43th LS(210725) Indices (PDF P60) | Jp Park | 2021-07-25 | 0 |
| 42 | 42th LS(210718) Indices (PDF P54) | Jp Park | 2021-07-19 | 0 |
| 41 | 41th LS(210715) Motion Problems (PDF P48) | Jp Park | 2021-07-15 | 0 |
| 40 | 40th LS(210712) Problem Solving (PDF P46) | Jp Park | 2021-07-13 | 0 |
| 39 | 39th LS(210706) Inequality Eqs (PDF P43) | Jp Park | 2021-07-06 | 0 |
| 38 | 38th LS(210701) Rational Eqs (PDF P41) | Jp Park | 2021-07-01 | 1 |
| 37 | 37th LS(210624) Rational Eqs (PDF P40 #2) | Jp Park | 2021-06-24 | 0 |
| 36 | 36th LS(210620) Algebra (PDF P38 #2) | Jp Park | 2021-06-20 | 0 |
| 35 | 35th Lesson(210617) Algebra (PDF P34) | Jp Park | 2021-06-18 | 0 |
| 34 | 34th LS(210530) SETS and Venn Diagram (PDF P37) | Jp Park | 2021-05-30 | 0 |
| 33 | 33th LS(210529) 연립방정식의 활용 (PDF P310) | Jp Park | 2021-05-29 | 0 |
| 32 | 32th LS(210523) 연립방정식의 활용 (PDF P310) | Jp Park | 2021-05-23 | 0 |
| 31 | 31th LS(210516) 연립방정식+일차방정식(PDF P310) | Jp Park | 2021-05-16 | 1 |
| 30 | 30th LS(210506) Simultaneous Eqs by Elimination (PDF P307) | Jp Park | 2021-05-06 | 0 |
| 29 | 29th LS(210425) Simultaneous Eqs by Substitution (PDF P305) | Jp Park | 2021-04-25 | 1 |
| 28 | 28th LS(210422) Simultaneous Eqs(PDF P304) | Jp Park | 2021-04-23 | 0 |
| 27 | 27th LS(210418) 직선의 방정식 (PDF P298) | Jp Park | 2021-04-18 | 0 |
| 26 | 26th LS(210414) 직선의 방정식 (PDF P294) | Jp Park | 2021-04-16 | 1 |
