Translation of Behauptung

I have the OK. They will make the changes and resend the homework tasks. I think that beginning of July would be a good date to start learning. What do you think? We should not wait too long.
But I guess that most children are that way. Maybe there are a few children that really want to be educated, but I think that these children grow up to fast. They need to enjoy their childhood.
Let me understand further: If you go through the 'vocabulary builder' in the left menu and choose new lesson it works faster than when you get there through the list of all lessons? Did I get this right?