1. Introduction
  1.1 Background
  1.2 Research Questions
  1.3 Significance of the Study
2. Literature Review
  2.1 Socio-economic Status and Academic Achievement
  2.2 Socio-economic Status and Biology Education
  2.3 Previous Studies on Socio-economic Status and Biology Achievement
3. Methodology
  3.1 Research Design
  3.2 Participants
  3.3 Data Collection
  3.4 Data Analysis
4. Results
  4.1 Relationship between Socio-economic Status and Biology Achievement
  4.2 Impact of Socio-economic Factors on Grades
  4.3 Influence of Socio-economic Status on Test Scores
5. Discussion
  5.1 Interpretation of Results
  5.2 Implications for Biology Education
  5.3 Limitations of the Study