N.H. Rev. Stat. Ann. § 195:16-b

Whenever a cooperative school district cannot acquire by purchase a good title to any real estate or interest therein needed by it for its purposes either because of the unwillingness of the owner to sell at a reasonable price, the owner's inability to convey a good title, or for other reason, the cooperative school district may apply by petition to the superior court for the county in which such real estate or interest therein is located to acquire such real estate or interest therein in the name of such district and to have assessed the damages occasioned by the taking. Thereafter the procedure shall follow that prescribed in RSA 498-A.