QuechuaStudent.org

From the site:

Experience the Amazon Rainforest while studying Spanish or fulfilling distribution requirements for the undergraduate degree Open to adventurous students and alumni from any college or university Applications are processed on a first come first served basis until all spaces are filled.

Courses in Quichua (Kichwa) are offered with an immersion program along the Napo River.

The Andes and Amazon Field School web page

http://www.otavalospanish.com/

Note that OSI no longer has a permanent Quichua instructor but arrangements may be possible by contacting the school.

OSI is a small Spanish school in Otavalo that offers Imbabura Quichua. Classes cost $8 an hour. Home stays and other services are available. The classes are one on one and very intense. What may be missing in formal structure will be made up for in the immersion. The school is very flexible and group courses and other options should be easy to negotiate. The school's director speaks excellent English.