The stuff here at Nibble U will have grade level info shown with it so you know which activities you might try. It is really hard to say a question is for a 4th grader and not a 3rd grader. Some of you will be able to do the activities designed for older students. And, if you find a level is too hard, be sure to drop down to an easier level. Professor Nibble is not perfect. He may say an activity is for 5th graders and then many students find the activities too hard or too easy. Be sure to E-mail the Professor and let him know when he makes mistakes!