This study investigated the development and application of two widely used methods of vertical equating: Rasch and Equipercentile. The assumptions underlying both techniques are discussed. Procedures for utilization of the Rasch method are illustrated. The study was conducted to determine whether, based upon Rasch vertical equating, a local school district should administer out-of-level tests (tests not on actual grade level) to exceptionally able students. A comparison was made between the school district's equating results and that of the test publisher's vertically scaled scores based on Equipercentile equating. Results indicated the publisher's vertical scale was comparable to the scale estimated from the local school district through use of Rasch equating. Limitations of both methods are discussed. (Author/DWH)