Sheila Dow and Paul Omerod's papers on reforming the economics curriculum to make learning more representationally realistic and practically useful, especially in policy formulation. Both take a systems approach that recognizes the place of formalism but put it in the context of the whole instead of either making it an end it itself or using advanced math as tour de force to mask ideological assumptions. Both articles are short.
Teaching Open-system Economics
See also Michael Hudson's The use and abuse of mathematical economics.