Final answer:
In a 9- to 10-year-old, one would expect the premolars to have erupted or to be erupting, and possibly the canines depending on individual development. The timing of tooth eruption varies individually, but premolars typically emerge after incisors and before the second permanent molars.
Step-by-step explanation:
A 9- to 10-year-old child is typically in the midst of transitioning from deciduous (baby) teeth to their permanent teeth. At this stage, the first deciduous teeth that are lost are the eight incisors, which generally fall out between the ages of six and eight. Following this, the eight premolars start to emerge, typically between the ages of nine and 12. Since the student in question falls within this age range, it's reasonable to expect the premolars to have erupted or to be in the process of erupting. Furthermore, the four canines generally are lost a bit later, between the ages of ten and 13, so these may also be present depending on individual development.
It's important to note that the exact timing of tooth eruption can vary from one individual to another. By the end of this period, most children will have a mix of permanent and deciduous teeth as they transition to their full set of permanent teeth, which, apart from the wisdom teeth, should all be present by the end of adolescence. As for molars, the second permanent molars emerge usually between the ages of 11 and 13, so it would be early for these to be present in a 9- to 10-year-old.