| Class 1 (CH 4 INTRODUCTION, KARIKA 1) | Download | |
| Class 2 (CH 4 KARIKAS 2,3) | Download | |
| Class 3 (CH 4 KARIKAS 4 TO 6) | Download | |
| Class 4 (CH 4 KARIKAS 7 TO 10) | Download | |
| Class 5 (CH 4 KARIKAS 11 TO 13) | Download | |
| Class 6 (CH 4 KARIKA 14) | Download | |
| Class 7 (CH 4 KARIKAS 14 TO 21) | Download | |
| Class 8 (CH 4 KARIKAS 21 TO 24) | Download | |
| Class 9 (CH 4 KARIKAS 25,26) | Download | |
| Class 10 (CH 4 KARIKAS 27,28) | Download | |
| Class 11 (CH 4 KARIKAS 29 TO 33) | Download | |
| Class 12 (CH 4 KARIKAS 34 TO 37) | Download | |
| Class 13 (CH 4 KARIKAS 38 TO 40) | Download | |
| Class 14 (CH 4 KARIKAS 41 TO 43) | Download | |
| Class 15 (CH 4 KARIKAS 44 TO 47) | Download | |
| Class 16 (CH 4 KARIKAS 48 TO 52) | Download | |
| Class 17 (CH 4 KARIKAS 53 TO 55) | Download | |
| Class 18 (CH 4 KARIKAS 56 TO 58) | Download | |
| Class 19 (CH 4 KARIKAS 59 TO 62) | Download | |
| Class 20 (CH 4 KARIKAS 63 TO 66) | Download | |
| Class 21 (CH 4 KARIKAS 67 TO 70) | Download | |
| Class 22 (CH 4 KARIKAS 71 TO 73) | Download | |
| Class 23 (CH 4 KARIKAS 74 TO 76) | Download | |
| Class 24 (CH 4 KARIKAS 77 TO 79) | Download | |
| Class 25 (CH 4 KARIKAS 80 TO 83) | Download | |
| Class 26 (CH 4 KARIKAS 84 TO 86) | Download | |
| Class 27 (CH 4 KARIKAS 87 TO 89) | Download | |
| Class 28 (CH 4 KARIKAS 90 TO 93) | Download | |
| Class 29 (CH 4 KARIKAS 94 TO 96) | Download | |
| Class 30 (CH 4 KARIKAS 97 TO 100) | Download | |
| Class 31 (CH 4 SUMMARY) | Download | |
