This book aims to contribute to the proper preparation of third-grade middle school students in the subject of biology.

Each section includes:
- Presentation of the content of each lesson through concise diagrams and question-answer formats
- Answers to all exercises in the "Student's Book" (let's think, questions-problems-activities, small research and projects, questions-problems-activities for review, small research and projects for review)
- Supplementary exercises of all types (development, multiple choice, true-false, matching, etc.) for the consolidation of new knowledge
- Hourly assessment criteria

Following are the answers to all activities in the "Workbook" and the "Laboratory Guide," as well as two-hour assessment criteria for the entire curriculum.

At the end of the book, answers to all supplementary exercises and assessment criteria are provided.