Also, there is again a translation error.
Bored -> use it when it describe a person's feeling.
Boring -> use it when it describe a thing, an event.
So, Page 1 -> the first 2 bored are boring, you are talking about the class.
And the last one "not bored anymore" you should add a "be" -> "not be bored anymore" since it's an adjective.
And page 2: the class is just begin you should change it to: The class has just begun
after that everything is right :)