Let's face it, spending time in the classroom can often be less than inspiring, or downright boring in some cases, and when it comes to study for the test, you may find yourself in a bit of tough spot. This is not because you didn't pay attention in class, but because the lessons were presented in such a way that you didn't understand anything even if you had been paying attention.

Fortunately, there are plenty of online tutorials that can come to your rescue, regardless of what you are studying. We have put together a list of some of the best ones.

Math, Data Science, and Engineering

Khan Academy tutorials, unlike some tedious classroom lectures, are presented in the shape of engaging, high-quality video files. You will be able to choose from a wide variety of subjects, and you will especially find these tutorials useful if you are a math or engineering student. Although most people still see Khan Academy as just a place where they can learn new non-academic skills, it is a valuable resource which can be used equally well for academic purposes.

If you are struggling with math, you will definitely want to check out Paul's Online Math Notes, which are published by Paul Dawkins, a math professor at Lamar University. The best thing about these notes is that they are presented in such a clear way that anyone can understand them, providing that they possess the most basic knowledge of math at college level. In other words, you will be able to apply the knowledge you have gathered here inside your math class.

Looking to improve your coding skills? Codecademy is probably the best place for it, because they provide you with an interactive learning environment in which you can learn and get up to speed on variety of programming languages, such as HTML/CSS, Python, JavaScript, PHP, and plenty of others. You can also take part in their initiatives, such as Code Year, during which they will send a coding assignment once a week to your email for the entire year.

Grammar and Writing

At The Purdue Online Writing Lab you will find materials which were created and used at Purdue University, and which can help you on a wide range of academic writing assignments. Because those assignments can be challenging, when it comes to their form and substance, you will need clear and effective pointers on how to do it right, especially when it comes to essay writing. Purdue also has handy sections for those with English as a Second Language.

Writing Center is good if you are looking to improve your writing skills at an undergraduate level, or if you are looking for help on a specific academic writing assignment, you can schedule a meeting here, and you will be able to receive individual training by experienced undergraduate Harvard tutors. The best thing about it is that you don't even need a particular paper or essay to work with: having an idea is often enough.

Essay Writing Guide- essays can be extremely challenging to write, which is why you may want to check this guide written by professionals from EduGeeksClub. This is a step-by-step guide to writing an essay which is dedicated to helping students with their academic writing assignments and to learn how it should be done if you are short on time.

Economics and Finance

eDX is known as one of the best places where you can find courses on just about any academic subject you can think of, and if you are studying economics and/or finance, rest assured that there are plenty of courses and materials to be found here which are taught at institutions such as Harvard, Berkeley, and MIT. They also have partnerships with Georgetown and Boston University, which only goes to show how good their courses are.

Open Culture is a valuable resource where you be able to access relevant courses, lessons, and study materials gathered from the best places on the Web, and that includes courses for economics students. The courses are completely free, and plenty of them feature video lectures, as well, so you don't get buried under a mountain of textbooks.

At The Open University you can find full study materials and courses on the subjects of finances, money, and management. All of the lessons are put together by top-notch professionals and professors, and written in a way you can understand them. Choose from a variety of different courses and improve your academic performance when it comes to financial topics.

Science

ALISON is a worldwide learning community that boast over 8 million students, and which offers science courses that are both high-quality and completely free for all to participate in. Whether you are looking for studying help, or looking to build upon your skills, you will find everything you need here. You can even get a certificate for each course, and because their courses are standardized, the certificates will come in handy one day when looking for a job.

CosmoLearning is a platform which offers thousands of science courses, videos, and studying materials which they have carefully gathered and selected from all over the Web. All of the courses and materials are completely free for anyone, as they believe that getting a good education should not cost you anything. Useful for both students and teachers!

AMSER - Science students are often struggling to find good learning resources they can count on, but once they check out AMSER, they will find everything they need in one place. AMSER is a resource for educational and learning services dedicated to helping science students improve their knowledge and get better grades by offering great studying materials free of charge.

Academic Success

    With these resources, you will be able to get all the help you need, and perhaps transform your academic career into a success story. Check them out today and enjoy the benefits of online education and courses.

    Author's bio: Karen Dikson is a college instructor and creative writer. She writes for several educational websites, including HuffingtonPost. She loves teaching, writing and helping her students to reach their goals. Connect with Karen via Twitter.