Source: The Great Interpretation of Dreams (Ibn Sirin)
A school in a dream indicates a place of knowledge and scholars. Entering it indicates seeking knowledge and guidance. Sitting in it indicates sitting with scholars.
Source: Perfuming Humanity in the Expression of Dreams (Al-Nabulsi)
A school indicates a wife or a child. Whoever sees himself building a school will be blessed with a scholarly child.
Source: Signs in the Science of Expressions (Ibn Shaheen)
A school is interpreted as goodness and benefit. Whoever sees himself learning in it will attain goodness and knowledge.