| Query concept | Precision of the query without expansion | Precision of the query with dominant meaning expansion | Improvement in the precision |
Q1 | Blended learning models | 0.59 | 0.84 | 0.25 |
Q2 | Role of the student | 0.46 | 0.73 | 0.27 |
Q3 | Role of the teacher | 0.42 | 0.74 | 0.32 |
Q4 | Change at the school level | 0.44 | 0.73 | 0.29 |
Q5 | Hardware, software and space | 0.34 | 0.72 | 0.38 |