Computing inclusions of Schur modules. We describe a software package for constructing minimal free resolutions of graded GL n (ℚ)-equivariant modules M over Q[x 1 ,...,x n ] such that, for all i, the i-th syzygy module of M is generated in a single degree. We do so by describing some algorithms for manipulating polynomial representations of GL n (ℚ) following ideas of Olver and Eisenbud-Fløystad-Weyman.