You may think it’s too late to learn the most sought-after professional skills of 2019, but you’d be wrong. Time moves fast but, come on, it doesn’t movethat fast. Workplaces of 2020 will still be looking for many of the same skills. What we’re trying to say here is that, in the 21st century, it pays to continue your education and constantly sharpen your skills.

Here are 20 courses you can take online, in your own time, that are all available for less than $20 each. They all cover some of today’s most in-demand skills so you can leverage your learning into a promotion or a new job.

App Design and Development

Android users have access to more than 2.1 million apps. Apple users have access to more than 1.8 million. And those numbers just account for the leading app stores, not the dozens of third-party stores and thousands of third-party apps not available on the Google Play or the App Store. Apple may have coined “There’s an app for that” years ago, but it didn’t become really true until recently. Everybody wants an app these days and the design and development industry has become a multi-billion dollar affair. People who can create apps from scratch are in major demand, so what are you waiting for? Cut off a piece of that pie.

• The Complete Guide to Designing a Mobile App— $14.99 (92% off $200)

• The Complete iOS SDK Development Course— $12.99 (93% off $200)

Marketing

You’ve probably noticed how marketing has changed over the past few years, especially when it comes to social media. Marketers have gotten smarter, yes, but there are also more tools than ever to help companies reach the audiences they want to reach. From Facebook and Google to YouTube and Reddit