CLASS 4

                                          Long and Short    Video lecture (link) 1.   https://drive.google.com/file/d/1ewh7cSyvQD8_x5nZeIS6ygaztTxIKWb0/view PPT 1)  https://drive.google.com/file/d/1EQ4X-B_2xiT8xrJZlixRFsELmZmSvyID/view?usp=sharing   Worksheet 1)  https://drive.google.com/file/d/13UEu3reTku0QEtSVE6IfW8QXcmm-0q0X/view