Are you looking for course and self-study material in Hausa or some other less commonly taught language? A good place to start looking for it is at LangSource, a searchable database for language resources offered by the . Currently, the LangSource catalogue offers resources in Arabic, Chinese, German, Hausa, Hindi, Japanese, Korean, Quechua, Spanish, Tamil, and Yoruba.
They have also developed LangNet, “a state-of-the-art online foreign language learning and maintenance system”. In a message on the H-Hausa discussion list, they have recently asked for educated Hausa speakers who are willing to contribute to a new Hausa project. Part of this would be creating online activities for Hausa learners.
Here is a link to their message