3 1 50 Part 4 A Teacher's Guide Arthur F. Coxford Primary Author james T. Fey Additional Author Christian R. Hirsch Additional Author Harold L. schoen Additional Author Eric W. Hart Primary Author Ann E. Watkins Additional Author Brian A. Keller Additional Author mixed material 1570398879 Chicago everdaty learning corporation 2001 Course 4 part A coure plus mathematics project Arthur F. Coxford Primary Author james T. Fey Additional Author Christian R. Hirsch Additional Author Harold L. schoen Additional Author Eric W. Hart Additional Author Ann E. Watkins Additional Author Brian A. Keller Primary Author mixed material 1570398852 Chicago everyday learning corporation 2001 indexvv.jpg.jpg Part B : Teacher;s Guide Arthur F. Coxford Primary Author james T. Fey Additional Author Christian R. Hirsch Additional Author Harold L. schoen Additional Author Eric W. Hart Additional Author Ann E. Watkins Primary Author Brian A. Keller Additional Author mixed material 15703978887 Chicago everdaty learning corporation 2001 indexcc.jpg.jpg