Very Narrow |
How do Spanish speaking students in Seattle 1st grade classrooms affect the learning of other students? |
Less Narrow |
How do non-English speaking students affect the learning of other students? |
Broader |
Bilingualism in U.S. primary schools |
Very Broad |
Bilingual education in the U.S. |
Very Narrow |
The effect of petroleum refining processes on skin cancer incidence in Texas |
Less Narrow |
The effect of fossil fuel exploitation on the ozone layer |
Broader |
The effect of energy production on global warming |
Very Broad |
The effect of human activity on weather |