It’s never a bad idea to make yourself more appealing to potential employers. But there are so many skills to learn, from coding, to graphic design, to Excel, and on and on, it can be hard to know where to start, and education is often expensive. So we’ve rounded up courses that cover all of the above and more, all for less than 20 bucks. Take a look, and pick the ways you want to boost your resume.

The Complete iOS 12 and Swift Developer Course – $10.99

iOS 12 is here, along with a bunch of new features, making this a great time to get into iOS development. With more than 40 hours of training, this bundle is the perfect place to start. Taught by popular instructor Rob Percival, it covers the essentials, from Swift 4 and Xcode 10, up to building fully working clones of apps like Uber and Instagram, and tons in between.

Buy now: Get the Complete iOS 12 and Swift Developer Course for $10.99. That’s a massive 94 percent discount.

Graphic Design Diploma Master Class – $23.20

Break into the world of visual communications with more than a month of comprehensive coursework. This class covers concepts in visual thinking, design principles, the basics of typography and more. Additionally, you’ll get familiar with the industry standard software like Adobe Photoshop, Illustrator, and InDesign, along with plenty of other insights and skills.

Buy now: Get the Graphic Design Diploma Master Class for $23.20 with promo code: GREENMONDAY20 . That’s a full 93 percent off the usual price.

Microsoft Excel Diploma Master Class – $15.20

Microsoft Excel is standard in almost any business that has a computer. So it’s well worth learning no matter your industry, but it can also be quite intimidating. This live course moves from basic skills, up through advanced courses in charts, graphs, lookups, and plenty more. Students work through it in small steps, leading to a full grasp of this powerful, ubiquitous tool.

Buy now: Get the Microsoft Excel Diploma Master Class for $15.20 with promo code: GREENMONDAY20, that’s a 95 percent discount.

The Social Media Marketing Master Class Bundle – $23.20

If you want to make money on the internet, you have to understand social media marketing. This bundle of 79 lectures covers the fundamental social media tools and concepts you’ll need to know, from the basics to converting sales, to Facebook marketing campaigns, gaining traction on Reddit, cultivating positive reviews, and lots more.

Buy now: Get the Social Media Marketing Master Class Bundle for $23.20 with promo code: GREENMONDAY20. That’s a massive 97 percent off the usual price.