There are 33 districts (as of January 8, 2019, with the announcement of Kallakurichi as a new district) in Tamil Nadu. Several of these districts were bifurcated or trifurcated from the original 13 districts established in 1956. The link provides more details on the evolution of these districts
Although TNF USA is sending about $ 1 Million annually to support various projects in Tamil Nadu, “Mann Vaasanai” is the single largest fund raising and corpus initiative since the formation of TNF in 1974. Only the interest generated from these funds will be used to expand and sustain TNF’s educational and humanitarian projects in those specific districts.
The goal of “Mann Vaasanai” initiative, launched by the TNF Board in 2018, is to ensure sustainability of selected TNF USA Board sponsored projects that will be implemented in all the 33 districts and the Union Territory of Pondicherry and for continued statewide presence of TNF.