German laws on the internet:

Site that brings together the main German laws available on the internet.
https://www.gesetze-im-internet.de/

Goethe-Institut USA:

The Goethe-Institut is the international cultural institute of the Federal Republic of Germany. It promotes knowledge of the German language abroad and international cultural exchange.
https://www.goethe.de/ins/us/en/index.html

German Embassy and Consulates General in USA:

https://www.germany.info/us-en
https://www.germany.info/us-en/embassy-consulates/atlanta
https://www.germany.info/us-en/embassy-consulates/boston
https://www.germany.info/us-en/embassy-consulates/generalkonsulat3
https://www.germany.info/us-en/embassy-consulates/gkhoustonen
https://www.germany.info/us-en/embassy-consulates/newyork
https://www.germany.info/us-en/embassy-consulates/san-francisco

German Academic Exchange Service:

The German Academic Exchange Service (DAAD) is an organization promoting academic and scientific exchanges. It is the world's largest organization for funding scientific mobility. DAAD is an association representing 231 German universities and higher education institutions.
https://www.daad.org/en/