- Lesson 51 ----- यण् सन्धिः (. यण् सन्धिः )
- Lesson 51 A --- Exercises with the यण् सन्धिः। (Exercises with the यण् सन्धिः। )
- Lesson 51 B --- Answers to Lesson 51 A.( Answers to Lesson 51 A.)
- Lesson 52 ----- Yaantavaantaadesha-sandhi.( Yaantavaantaadesha-sandhi.)
- Lesson 52 A --- Exercises with the यान्तवान्तादेश-सन्धिः ।(Exercises with the यान्तवान्तादेश-सन्धिः ।)
- Lesson 52 B --- Answers to Lesson 52 A.(Answers to Lesson 52 A.)
- Lesson 53 ----- A Glimpse of Vyanjana Sandhi.(Vyanjana Sandhi.A glimpse)
- Lesson 53 A --- Further exercises with Sandhi.(Further exercises with Sandhi.)
- Lesson 53 B --- Answers to Lesson 53 A, and summing up Month 12( Answers to Lesson 53 A.)