To effectively self-regulate learning, children need to self-evaluate whether they meet learning goals. Unfortunately, self-evaluations are often inaccurate, typically, children are overconfident. We investigated whether developmental progression in self-evaluations is related to children's (48 6- year-olds and 50 8-year-olds) reduced sensitivity to self-protection biases. Eight-year-old children's self-evaluations were more accurate than 6-year-olds' evaluations. Six-year olds based their confidence judgments on performance feedback, but did not use feedback to the same extent when self-rewarding. This may indicate that self-protective biases are an important cause of inaccurate monitoring, and that six-year-olds are more self-protective than eight-year-old children.