This index is more than science. It includes indexes to articles on arts and humanities and the social sciences, too. Over 8,400 scholarly journals are indexed in this database.
Mathematics
zbMATH
This is an excellent database for finding documents, authors, and journals related to mathematics. Some of them are freely available, while others require payment
Education Resources Information Center ERIC,
ERICof the Institution of Education Sciences, allows you to search by topics related to education. Links lead to other sites, where you may have to purchase information, but you can search for full-text articles only.