Father Pojit Marak, Associate Director of Don Bosco Institute, Guwahati, introduced the author and presented a short summary of the book. He said, ``the book is a useful manual for teachers to make their teaching effective, meaningful and worthwhile for students.`` Director Don Bosco Communications-Father P.D. John, welcomed the Chief Guest and other dignitaries. Chief Guest Father Teron congratulated the author for his effort and perseverance in completing the book, with very relevant topics which will be of great use to the teachers to make their teaching-learning process enjoyable and efficient. The author Father Chittattukalam, who turned 80 in 2019, spoke very little and thanked everyone who made it possible to publish the book. As food for thought, he raised a question ``what legacy are we leaving behind?`` In so saying, the author implicitly intended that writing a book is leaving a legacy of wisdom and experiences for future generations. Thus, he invited everyone to write and share their knowledge and experience. The author presented a copy each to all the dignitaries and special invitees. He thanked them for their encouraging presence. The book is published by Media House Delhi and copies are available from Don Bosco Media and Publications, Guwahati and other Media House branches.