The document provides a mark scheme for evaluating research investigations. It outlines 4 levels of achievement with associated mark ranges. Level 1 (0-17 marks) indicates limited evidence of research that has been presented in an unclear way. Level 2 (18-26 marks) reflects basic research that has been applied simply. Level 3 (27-35 marks) represents sound relevant research from a range of sources that has been applied and presented with supporting points. Level 4 (36-45 marks) is for excellent research from a wide range of sources that has been analyzed and applied sophisticatedly.