Get 75% off more than 300 courses with Udemy (using coupon code LIFEHACKER75), one of the largest marketplaces for teaching and learning. Udemy features over 10,000 expert instructors in courses ranging from guitar to photography to web development, and all are on-demand and available 24/7 via phone, tablet, or web.

Courses at Udemy help to foster new skills for a career change or a growing interest, or to simply refine and improve existing talents. Highlighted below are four courses, but you can find hundreds of others at 75% off using code LIFEHACKER75.

Become a Web Developer from Scratch - $199 now $49

This course is for anyone who's wanted to learn web development but didn't know where to begin. Whether you have basic knowledge and experience in programming or none at all, this course instills confidence in a wide variety of languages and applications. Course highlights include:

  • Basics: Covering HTML, XHTML, CSS, and Javascript
  • Backend Development: Covering PHP, MySQL, XML, and jSON
  • FrontEnd Development: Covering AJAX, jQuery, HTML5, CSS3
  • Final projects to apply what you've learned with the source code available for download

Click to enroll in Become a Web Developer from Scratch.

The Online Marketing Crash Course: Traffic, Leads & Clients - $197 now $49

This course is for any small business owner, entrepreneur, or blogger in need of a marketing strategy to better reach and grow their target audience while increasing conversion rates and site traffic. Course highlights include:

  • A 30-day action plan to establish a strong marketing foundation
  • Building trust and authority with your audience
  • Create engaging blogs and videos
  • SEO made simple

Click to enroll in The Online Marketing Crash Course.

Swift - Learn Apple's New Programming Language by Examples - $99 now $24

Swift is the newest programming language for iOS and OS X and this course will give you a jumpstart in understanding the language, and its evolution from the predecessor Objective C. Course highlights include:

  • Over 78 lectures and 4 hours of content
  • Learn operators, strings, characters, and collection types as well as control flow
  • Work in Xcode's new .playground file
  • Understand Swift's development from Objective C and how it compares to other common languages

Click to enroll in Swift - Learn Apple's New Programming Language by Examples.

Creating Responsive Web Design - $150 now $37

This course teaches you how to create a web design that will automatically conform to multiple screen sizes, automatically rearranging content and resizing elements based on the user's screen. Course highlights include:

  • Learn CSS3 media queries
  • Integrate Google's HTML5 Shiv JavaScript
  • Learn image slicing and optimization techniques in Photoshop
  • Apply varied amounts of compression to images to optimize download speeds across devices.

Click to enroll in Creating Responsive Web Design.

Want to see all the courses? Click to enroll in hundreds of other courses at 75% off using code LIFEHACKER75.

Terms and Conditions: Coupon code is not valid with any other promotional offer or discount and is valid until 8/1/14 11:59 PDT. One coupon code use only per purchase. Coupon code requires a Udemy account, and is subject to terms and conditions found here. Udemy reserves the right to cancel the coupon code at any time. Coupon code is not exchangeable for cash. Coupon code is not valid with purchases made on the Udemy iPhone, iPad or Android app. Some courses do not apply. If you return your purchase, you will be refunded the amount paid. Offer good while supplies last.

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