Preface.- 1.Introduction to the book -- 2.Doing mathematics with tools: one task, four tools -- 3.The life of modern Homo Habilis Mathematicus: Experimental computation and visual theorems.- 4.Tools, human development and mathematics .- 5.The development of mat hematics practices in the Mesopotamian scribal schools -- 6.Discussions of Part A chapters.- 7. Developments relevant to the us…