Metamemory advances significantly in middle childhood, however, children as young as 5 or 6 have some rudimentary grasp of metamemory. Give an example of what a middle-school child would knows about it versus what a first grader knows

What will be an ideal response?

A young child could tell you that a short list is easier to remember than a long list or that they would be more likely to remember something yesterday than something years ago. However, older children would be able to tell you the various steps they took to solve a problem and they would be more realistic in appraising their own memory abilities.