On Some Explicit Constructions of Finsler Metrics with Scalar Flag Curvature We give an explicit construction of polynomial (\emph{of arbitrary degree}) $(\alpha,\beta)$-metrics with scalar flag curvature and determine their scalar flag curvature. These Finsler metrics contain all non-trivial projectively flat $(\alpha,\beta)$-metrics of constant flag curvature. Keywords:Finsler metric, scalar curvature, projective flatnessCategory:58E20