Rodrick is extremely lazy and careless when it comes to school, which elucidates where Greg learns it from. He almost never gets a grade above C-, except for his book reports (where Frank does most of the work due to Rodrick's inability to type). Greg believes that Rodrick is lazy and unintelligent in all other areas.Even though Rodrick is often lazy, mean, careless, and irresponsible, he is shown to have a softer side at times, as seen where he can occasionally treat Greg nicely and get along.