Ieraning processes in a classroom which lead students to be passive and less interactive to each' other will possibly affect their low and limited abilities to analyse and to solve material problems. The writing simply aims at investigating whelher there is an intrease or a decrease in the number of students who have suficient skills in analysing leaming materials end solving problems after they are involved in classrooms that implement the group investigation method, This proiect is conducted in the framework of classroom Lctiin ,esearch (CAR) b:, which primary data are collected through observation and evaluation from both mid. and final exaus. As a resub, students who are attending their classrooms hqve been generally inprovetl in temrs of analysis atd probleu solving skills