00670nam a2200181 a 4500001001400000003000400014008004100018020002500059050002200084100002200106245011900128250001100247260006900258300001800327650006200345650005800407700002300465vtls000086356MTX110501c2004    xxka          000   eng d  a0131127985 /c700.0000aQ181bK75 C3 20041 aKoballa, Thomas R10aCases in middle and secondary science education : the promise and dilemmas /cThomas R Koballa, Deborah J. Tippins  a2rd ed  aUpper Saddle River, N.J. :bPearson/Merrill Prentice Hall,c2004  a308  p :bill 0aSciencexStudy and teaching (Middle school)xCase studies 0aSciencexStudy and teaching (Secondary)xCase studies1 aTippins, Deborah J