lesson 12

docs/index.md

@@ -20,4 +20,5 @@ hero:
 
 - [Lesson 9: Conjugate 이다](./howtostudykorean/unit-1/09-conjugate-이다.md)
 - [Lesson 10: Numbers](./howtostudykorean/unit-1/10-numbers.md)
-- [Lesson 11: 동안, Seconds, Minutes, Hours, Days, Weeks, Months, Years](./howtostudykorean/unit-1/11-time.md)
+- [Lesson 11: Date, Time, Duration](./howtostudykorean/unit-1/11-time.md)
+- [Lesson 12: Particles 들, 만, 에서, 부터, 까지, (으)로](./howtostudykorean/unit-1/12-more-particles.md)