In this algebra course, discover the ins-and-outs of quadratics--and learn how to solve equations by graphing, factoring, completing the square, and using the quadratic formula.

Whether you are a math student, or an adult seeking a refresher, it is time to brush up on Algebra! In this course, master algebraic concepts from start to finish!

New to algebra and confused by its concepts? In this Algebra I course for beginners, Math Fortress provides clear and concise explanations, starting with variables and ending with word problems.

Studying for the Regents Exam and need help with the algebra one section? In this course, run through thirty-seven example problems that cover basic algebra concepts you'll need to know to pass.

Does solving for x make your head spin? Math teacher Eric Buffington explains the simple steps to finding x, from one-step addition problems to equations with x on both sides of the equals sign.

Jump-start your Android development skills with Learn to Program! This beginner-level course starts with a review of the Java principles you need to understand before designing more complex programs, including inheritance and interfaces. Then, start working with Android SDK—the bundle of free tools for developers. Learn how to structure your application, add graphics, build an effective architecture, and add the bells and whistles before testing out the program with an emulator and going live!

Want to know how to code an Android app? Learn everything you need in this intermediate course. From basic Java and the free Eclipse ADT, to debugging—get ready to launch your custom Android app!

Follow along and learn how to create mobile apps in this project-based development course. Follow along and make 10 different apps you can use and distribute to iOS, Android, Kindle and more!

Explore the ins and outs of Unity 5's flexible animation system, stellar physics capabilities, and audio mixer. Learn how to start developing your own 3D games and interactive experiences!

Looking for an interesting Arduino project? Develop new skills as you learn how to set up radio frequency (RF) communication, and build a wireless weather station using two Arduino Uno units.

Electronic sensors are the eyes and ears of machines. In this course, learn about a variety of sensors and their applications, and discover how to implement them in your Arduino prototyping setup.

Learn how to build and code an obstacle-avoiding Arduino robot that can interpret and process information about the surrounding environment with sensors, and then translate it into action!

Are you interested in learning how to program, work with electronics, or use a microcontroller platform? In this course for budding programmers, learn about these tech concepts by using an Arduino!

Are you interested in learning your way around Arduino open source hardware? This course with Electron Fun presents step-by-step instructions for creating interesting and useful DIY electronics.

If you observe the night sky, do you know what's up there? Stars, galaxies, constellations, and more! In this stargazing course for beginners, learn to find and identify celestial bodies.

Take a road trip through the cosmos and explore galaxies! Astrophysicist Sebastian Pines explains the science behind these gravitationally bound systems, from black holes to nebulae.

When you look up into the sky, do you ever wonder about the other planets that orbit around the Sun? This course explores our Solar System, from Mercury to the distant ice giants.

In this course, pick up expert advice about setting up a computer safely and quickly, creating a network drive, replacing a laptop screen, installing a CPU, overclocking your computer, and more!

Google offers a full suite of free apps to help manage your personal and professional lives, organize files, and increase productivity. Learn how to use Google Drive, Docs, Sheets, Gmail, and more.

In this course, an expert from Computer Care Clinic introduces the basic features you need to know to navigate Windows 10. Learn how to customize the Start menu, find your favorite programs, and more.

Need detailed guidance on how to make the best of the Windows 10 operating system? This course familiarizes beginner students with the Windows 10 user interface and its basic capabilities.

If you're a Mac or Windows user looking for more control over your operating system, switch to open source Ubuntu Linux! Install and customize the latest Ubuntu build in this course.

Plants are able to take sunshine and water and create glucose to fuel their growth. The miraculous process by which this happens is called photosynthesis. Learn all about it in this biology course!

Why in the world do snakes have hipbones? Charles Darwin sure has an answer! In this exciting biology course, follow along with Craig Savage and learn about natural selection and evolution.

Preparing for the AP Biology exam? In this three-part course, get clear explanations of Darwinian evolution by natural selection, modern evolutionary theory, and the history of life on Earth.

Biochemistry allows us to understand the large biomolecules that run every living organism. Do you want to learn about nutrition? Metabolism? Medicine and general health? This is the course for you!

Join conservation biologist Paul Ehrlich to explore the world's ecology, including topics like climate disruption, overpopulation, and conservation methods.

Need some tips for Calculus 1A? Or maybe you’re madly reviewing for tomorrow's math test? Either way, never fear - Krista, an experienced math tutor, will help you understand the world of calculus, step-by-step. Start by learning the difference between a function and an equation - and how to analyze a function's graph for continuity and limits. Then, step into the world of tangent lines, differentiation, and more. Each lesson includes examples and sample problems to help you along the way.

Worried about taking a college-level or AP Calculus class? Fret not! In this course, review simple examples and graphs to explore the main concepts of both differential and integral calculus.

Do you need a little help preparing for the AP Calculus AB exam? Look no further. This course covers the basic ideas of calculus, including: functions, limits, derivatives, and integration.

Calculus students ready to advance to the next level: this course is for you. Learn all about the cross product, starting with the right hand rule, and ending with how to measure torque.

In this calculus course discover the geometric interpretation of the dot product (also known as the scalar product), the component definition of the dot product, and properties of the dot product.

Professor Dave covers the fundamentals of chemistry with short and simple lessons on using scientific notation, balancing chemical equations, understanding atomic theory, and more.

Explore the basic properties of gases and learn how gas molecules move, are measured, and react to changes in pressure, volume, and temperature with easy-to-understand illustrations and examples.

This course on nuclear chemistry and radioactive decay from Prof. Amanda Holton discusses the differences among alpha, beta, and gamma decay; nuclear fusion and fission; and nuclear kinetics.

Organic chemistry can be complex and difficult to learn. Professor Dave makes learning organic chemistry easy with this comprehensive course that explains the basics in a structured and linear way!

Are you a chemistry student delving into quantum mechanics? In this course, review historical, mathematical, and conceptual topics of quantum mechanics, and experiments that led to key findings.

In today's business environment, system development and computer programming drive innovation and make things work better. Get an in-depth overview of how they work together for managing a business.

If you want to add Linux to your programming skills, get expert insights and on-screen demonstrations in this deep-dive course that can help you launch or elevate your software development career.

In this digital logic course, learn basic types of binary coding, adding and subtracting binary code, AND, OR, XOR, NOT, NAND, and NOR gates, logic circuits, De Morgan's Theorem, and Karnaugh maps.

Learn how to set up a do-it-yourself home wireless network in this course. From terminology and equipment to setup and best practices, this hands-on IT course teaches how to build a wifi network.

You've likely heard about hacking and tried to protect your online identity from hackers. But what is hacking, who does it, and why? In this complete web hacking basics course, answer these questions!

Microsoft Access, part of the Microsoft Office Professional suite, is the go-to entry-level software for mass tracking and managing of records. In need of your own data management system for your small business? This 14-lesson course for beginners from Amicron shows you how to use Access to create tables and run queries, sort and filter data using several easy-to-use parameters, work with different data types, and more.

Used on servers all over the Net, PHP is one of the most important web development tools. Learn the basics of PHP, and how to use the programming language to run, access, and edit a MySQL database!

Learn the basics of how to use popular application software like Microsoft Word, Excel, and Access to compose text documents, create spreadsheets, edit images and videos, and more!

Developing a relational database with SQL is within grasp in this comprehensive, beginner- to intermediate-level programming course! By the end of this course, understand how to work fluently in SQL.

Have you already tackled the basics of Python? Are you itching to move on to more challenging, interactive programming? In this 22-lesson, intermediate-level course, Alex Bowers from Learn to Program breaks down concepts such as user input, methods, classes, and inheritance. Start incorporating external files and databases with the help of SQL, and even write your own functions. When you’re done, put your coding skills to the test with Learn to Program’s advanced course on developing games with Python.

In this course, explore Dreamweaver CC's interface, learn how to plan and define your site, save images that work best online, and discover how to use hexadecimal colors and hex color code.

Building a computer from scratch? Watch how to do each step from start to finish—from choosing the right computer hardware, to installing the motherboard, to booting up your new DIY computer!

Learn how to set up a do-it-yourself home wireless network in this course. From terminology and equipment to setup and best practices, this hands-on IT course teaches how to build a wifi network.

Sensors perform a hugely valuable function in electronic devices, and in this course, electrical engineer Dorian McIntire provides an in-depth look at how different kinds of sensors operate.

In this course, learn what defines the discrete-time Fourier transform, how it is related to different signal functions, as well as how to evaluate its properties numerically and graphically.

Are you an electronics hobbyist who wants to start building simple electronic circuits with LEDs? This course is a great way to apply a circuitry foundation and learn a bit of electrical engineering!

Having trouble in geometry class? Reviewing for the SATs? This course from Math Fortress explains the principles of geometry, from segments, intersections, and degrees to angles and congruence.

Building a custom gaming computer can be easy when you have a step-by-step guide. Learn how to install each component—from the motherboard to the graphics card—and build a high-performance gaming PC!

If you’re looking to put together an electronic prototype that will last, you’ll want to solder the parts together. In this course, learn how to use a soldering iron on sensitive electronics.

Want to become a certified computer genius? Take on the rewarding challenge of building and customizing your own PC. CPU Modder reveals the necessary parts and calls out beginner PC builder mistakes.

You've likely heard about hacking and tried to protect your online identity from hackers. But what is hacking, who does it, and why? In this complete web hacking basics course, answer these questions!

If you're new to either computers or Windows 7 and want to learn how to navigate this easy-to-use operating system, this beginner-friendly course from Instructor Gadget is for you.

With the spread of tablets and smartphones, there are more opportunities for programmers than ever before. In this intermediate-level course, get your start as a developer for Apple iOS devices!

Looking for a programming language that can do some heavy-lifting but doesn't take years to master? When programming for iOS, OS X, and watchOS, Apple's programming language Swift is the best choice!

Are you interested in making your first iOS or OSX app? Mark Lassoff, the founder of Learn to Program, offers a beginner-friendly overview of Swift using the Xcode development environment.

Follow along and learn how to create mobile apps in this project-based development course. Follow along and make 10 different apps you can use and distribute to iOS, Android, Kindle and more!

Need some tips for Calculus 1A? Or maybe you’re madly reviewing for tomorrow's math test? Either way, never fear - Krista, an experienced math tutor, will help you understand the world of calculus, step-by-step. Start by learning the difference between a function and an equation - and how to analyze a function's graph for continuity and limits. Then, step into the world of tangent lines, differentiation, and more. Each lesson includes examples and sample problems to help you along the way.

Statistics may sound like a dry topic, but developing data analysis skills will unlock fascinating worlds! In this 10-lesson course from statistics teacher Zac Rappell, start by understanding group data and central tendencies (mean, median, and mode), then explore measures of spread (range, IQR, and standard deviation). Learn how to create stem and leaf and box and whisker plots, and practice comparing data sets to identify new relationships. Finish with a fun final project analyzing the Oscars!

Studying for the Regents Exam and need help with the algebra one section? In this course, run through thirty-seven example problems that cover basic algebra concepts you'll need to know to pass.

Calculus students ready to advance to the next level: this course is for you. Learn all about the cross product, starting with the right hand rule, and ending with how to measure torque.

Fundamentals of Laplace transforms such as definition, limits, properties, and few examples.

Physics: it's what makes us who we are—and it's how we interact with the world. This course explains in detail all you need to know about modern physics concepts, from the big bang to black holes.

Explore the basic properties of gases and learn how gas molecules move, are measured, and react to changes in pressure, volume, and temperature with easy-to-understand illustrations and examples.

This course on nuclear chemistry and radioactive decay from Prof. Amanda Holton discusses the differences among alpha, beta, and gamma decay; nuclear fusion and fission; and nuclear kinetics.

Wondering how nuclear fusion differs from fission? Why radioactivity produces energy? Discover answers to these questions and more in this physics course covering the science behind radioactivity.

After understanding the basics of quantum mechanics, learn about the early experiments on wave particle duality, the Heisenberg Uncertainty Principle, and more in this advanced physics course.

Volcanoes are one of the many fascinating geomorphic forces that shape our planet. Learn about the types of volcanic rock and the impact of volcanic eruptions in this earth science course.

Physics: it's what makes us who we are—and it's how we interact with the world. This course explains in detail all you need to know about modern physics concepts, from the big bang to black holes.

When you look up into the sky, do you ever wonder about the other planets that orbit around the Sun? This course explores our Solar System, from Mercury to the distant ice giants.

Biochemistry allows us to understand the large biomolecules that run every living organism. Do you want to learn about nutrition? Metabolism? Medicine and general health? This is the course for you!

Organic chemistry can be complex and difficult to learn. Professor Dave makes learning organic chemistry easy with this comprehensive course that explains the basics in a structured and linear way!

Building a video game is a wonderful learning experience that uses many different skills. Learn learn how to build a game using Scratch, a free game design software from M.I.T.

Want working knowledge of Python—fast? This course from Bitesize Business School is an accelerated introduction to one of the most important coding languages.

Learn Django the smart way—by building a website! Find out about this popular Python-based framework and get hands-on coding experience as you create a complex website.

C++ is a diverse programming language that can be used to create applications, games, and more. In this beginner-friendly course, you'll learn everything you need to know to master C++ programming.

Explore the ins and outs of Unity 5's flexible animation system, stellar physics capabilities, and audio mixer. Learn how to start developing your own 3D games and interactive experiences!

Statistics may sound like a dry topic, but developing data analysis skills will unlock fascinating worlds! In this 10-lesson course from statistics teacher Zac Rappell, start by understanding group data and central tendencies (mean, median, and mode), then explore measures of spread (range, IQR, and standard deviation). Learn how to create stem and leaf and box and whisker plots, and practice comparing data sets to identify new relationships. Finish with a fun final project analyzing the Oscars!

Mike Marin explains R programming languages basics, and shows you how to install the integrated development environment (IDE), perform arithmetic operations, and import data from Excel.

Building a video game is a wonderful learning experience that uses many different skills. Learn learn how to build a game using Scratch, a free game design software from M.I.T.

What is probability and how are statistics principles applied to modeling information? In this intro course cover the basics of a discipline applied to everything from consumer trends to global trade.

William Spaniel, author of "Game Theory 101: The Complete Textbook," explains concepts in the study of strategic decision making. Learn to apply math and logic to determine the best possible outcome.

If you're familiar with writing HTML, Java, or CSS -- then you know that there's more to creating a website or app than just writing reliable code. The project also needs the right look and feel to engage the user and provide a high-quality user experience. In this course, learn about the fundamental principles of design. Learn about using color, space, typography, layout hierarchy, and more. Finally, review user expectations and learn how to create a design that meets them!

If you're considering redesigning your website, this essential course from Digital Media professor Kristen Palana covers how to take an old website and give it a makeover to boost your web presence!

This beginner-level course is designed to help you learn the basics of web page design using HyperText Markup Language. Gain more control over your pages by learning to use stylesheets!

Want to add a layer of interactivity to your HTML website without wasting time on a programming language that isn’t built to last? Whether you’re new to coding or looking to brush up on old skills, you’ll find everything you need to know about JavaScript basics in these 19 lessons. Learn how to use operators, variables, conditional statements, loops, and more. By the end of this course, you should have the necessary tools to start building your own dynamic website or browser-based game.

Build a fully featured mobile app using HTML5, CSS, JavaScript, jQuery, and AJAX. Structure and format the app using HTML5 and CSS, then use a variety of coding languages to enable more features.

If you're considering redesigning your website, this essential course from Digital Media professor Kristen Palana covers how to take an old website and give it a makeover to boost your web presence!

Are you an ASP.NET Model View Controller (MVC) developer looking to learn an HTML-based structural framework for dynamic web apps? Get introduced to AngularJS in this coding course.