The first two chapters of computer book is available in the following link. Kindly read the chapters thoroughly and do the exercises of brain developer in the book itself and the question and answers in a rough notebook. Please click the link to download : For Class 4 ( Class 3 going to 4 ): https://drive.google.com/file/d/1BKV_NSmv3TfqmPP03tgFgywzB-WZFYVs/view?usp=sharing