From reactions to the world of acids and bases, the study of chemistry can present certain unique challenges to all types of students. Fortunately, there are helpful sites like ChemTutor. As their site mentions, ChemTutor "begins with the fundamentals and gives expert help with the most difficult phases of understanding your first course in chemistry." The site's layout is quite straightforward, as users can just click on any of the topics offered on the homepage. These topics include reactions, atomic structure, elements, and solutions. Within each topic, visitors can take advantage of sample problems, look over helpful diagrams, and so on.