For third grade, my daughter did similar to what your child is doing now. Near the end of third grade, she began doing some of her copywork in cursive and occasionally wrote a narration (she enjoys writing).
In fourth grade (9years old), I require all school work to be written in cursive. That was also the requirement when I taught fourth grade language arts in a private school.
In other words, third grade was a transition year from print to cursive. She began learning cursive in second and mastered it in third.