The way the child helps a younger sibling or the quiet passion they have for a hobby that doesn't fit into the curriculum.
: Some comedic takes explore the "secret" ways parents prepare for these meetings, such as bribing children for good reports or the anxiety of having their own parenting "graded". Mama-s Secret Parent Teacher Conference -Final-
If this is for an actual school assignment or a guide, "proper content" includes: The way the child helps a younger sibling