| 276 | 275th LS(200915) CH 8.5 Recursive Rule(P441) | jp Park  | 2020-09-15 | 1 |
| 277 | 276th LS(200917) CH 8.5 Recursive Rule(P449) | jp Park | 2020-09-18 | 1 |
| 278 | 277th LS(200918) CH 8.5 Recursive Rule 연습문제(P450) | jp Park | 2020-09-19 | 1 |
| 279 | 278th LS(200919) CH9 Trigonometry Ratio | jp Park | 2020-09-20 | 0 |
| 280 | 279th LS(200921) CH9.3 Trigonometry Function(P477) | jp Park | 2020-09-22 | 0 |
| 28 | 27th Lesson 동영상(2019/01/01 TUE) | jp Park | 2019-01-01 | 0 |
| 281 | 280th LS(200923) CH9.3 Trigonometry Function(P481 EX4) | jp Park | 2020-09-24 | 1 |
| 282 | 281th Lesson(200926) CH9.4 Graphing sin and cos Function(P4.. | jp Park | 2020-09-27 | 2 |
| 283 | 282th LS(200928) CH9.4 Graphing sin and cos Function(P489) | jp Park | 2020-09-29 | 0 |
| 284 | 283th LS(201001) CH9.5 Graphing other Trigonometry Function(.. | jp Park | 2020-10-02 | 2 |
| 285 | 284th LS(20103) CH9.5 Graphing other Trigonometry Function(P.. | jp Park | 2020-10-04 | 1 |
| 286 | 285th LS(201005) CH9.7 Using Trigonometry Function(P512) | jp Park | 2020-10-06 | 1 |
| 287 | 286th LS(201007) CH9.7 Using Trigonometry Function(P518) | jp Park | 2020-10-08 | 11 |
| 288 | 287th LS(201010) CH9.8 Sum and Difference (P523) | jp Park | 2020-10-11 | 21 |
| 289 | 288th LS(201012) CH9.8 Sum and Difference Review | jp Park | 2020-10-14 | 2 |
| 290 | 289th LS(201014) CH 10.1 Sample Space(P541) | jp Park | 2020-10-15 | 3 |
| 29 | 28th Lesson 동영상(2019/01/02 WED) | jp Park | 2019-01-02 | 0 |
| 291 | 290th Lesson(201017) Independent and dependent | jp Park | 2020-10-18 | 0 |
| 292 | 291th LS(201019) 과제질의+CH 10.2 Independent and Dependent(P552.. | jp Park | 2020-10-20 | 1 |
| 293 | 292th LS(201021) 과제질의+CH 10.3 Two Way Table(P560) | jp Park | 2020-10-22 | 1 |
