Complex sentence: He makes Bart interested in the subject by talking about Roosevelt's heroic and rebellious nature and classmates Milhouse, Nelson, Jimbo, Kearney and Dolph soon join Bart in his education.
Split into simpler sentences: He makes Bart interested in the subject by talking about Roosevelt's heroic and rebellious nature. Classmates Milhouse, Nelson, Jimbo, Kearney and Dolph soon join Bart in his education.