The objective of "Essential Biology for Junior Students" (Who are studying at Grade 5 to 10th grade students) is to expand the power of observation creating inquisitiveness in the minds of the learners and to create positive attitude about different elements in environment particularly in our Biological atmosphere. In-fact, keeping all these in consideration Essential Biology for Junior Students has been introduced. To make the book joyful to the learners, along with theoretical aspects of science some activities for 'learning by asking your self" have been included in it. Considering the challenges and commitments of 22nd century and following the revised book has been written. Therefore we welcome with our highest consideration any suggestions