You will need some proficiency in ancient Greek to use this resource.
The TLG is a full- text database of virtually all ancient Greek texts surviving from the period between Homer (8th century B.C.) and A.D. 600, and a large number of texts deriving from the period between A.D. 600 and the fall of Byzantium in 1453. Scholia and Byzantine historiographical and lexicographical works are also included. For assistance with using this database, consult the extensive TLG help files. If you're having trouble navigating this resource, consult with your professor.
Always use the translation your professor recommends!
English translations of classical texts can differ markedly. Most translations that are freely available on the web are in the public domain (out of copyright), which means that they are much older and reflect neithor more recent translation practices nor updated research on language and text variants.
The Perseus Digital Library provides an extensive collection of texts (in Greek, Latin, and also English translation) and images of art and archaeological artifacts. Note that the texts are older editions and translations that are out of copyright (so that they can be shared freely online), but they do not reflect subsequent textual scholarship and translation practices.
For best results, use the Perseus Hopper advanced search.
It also possible to browse the subcollections:
Primary sources are original, uninterpreted information. Scholars analyze primary sources in order to answer research questions. Examples of primary sources vary by discipline.
Examples in the humanities:
Examples in the social sciences:
Example in the sciences: