It does, but it's hard to read on the test strips. I too have that problem ... so we simply state it as 0 because it's low =)
Lets just assume the tank is cycled, it's not unlikely that it is. And if not, he does water changes (small/medium) once every 2 days, so the water stats probably are what he states them to be.
I'm more concerned about the temperature changes the tank will be going through if the heater is only on through out the afternoon. I've got him checking this evening if the thermometer on his heater works so he can leave it plugged in all day/night.
Please do keep in mind that he is still a child, one that doesn't get help from his parents I might add. He does try to keep his fish in the best condition possible, and like nearly everyone who was once a child, he too makes mistakes.
I actually think he's doing alright, he water stats are fine, the fish aren't dead (yet at least), and he tries his best. I know for a fact that most kids (average kids, not kids on this forums) wouldn't do water changes at all, or actually care about what the fish they're keeping feel like. Please try to understand we aren't all born experts.