摘要:AbstractFlavell (1979; 1981) considers metacognitive knowledge as one of the components of metacognition and defines it as “a person's own cognition or his general knowledge of cognition”. One of the topics in which metacognitive knowledge plays an important role is mathematical problem solving. Aim of this study is to evaluate metacognitive knowledge which 5th grade primary students use. The study is qualitative and has been fulfilled in 2009- 2010 autumn semester. Some of the results obtained from the research findings are as follows: Average points of all the students for their; procedural knowledge are very high; declarative knowledge are above the mid-level; conditional knowledge are below the mid-level.