“Summer school” sounds daunting, right? Why be hitting the books when you could be hitting the beach and soaking up some sun? Yet, just because it’s the summer doesn’t mean you should be letting your brain collect layers of dust. Boston Startup School is in full swing, and the students are excited. General Assembly is getting ready to hit the hub, and the June 23rd event is stacked. (Hope you didn’t miss the discount code.)

And beyond those programs, there are plenty of opportunities to school yourself this summer, courtesy of Skillshare, Intelligent.ly and MIT OpenCourseWare. From “Design for Developers” to “Early Stage Capital,” there’s plenty of classes perfectly suited for budding entrepreneurs. But, the fun doesn’t stop there, because there are some “fun” classes out there, too. (And by “fun,” we just mean a little less serious.) So, mix it up this summer with these 10 classes. No need to let your brain rot.

The more serious.

Agile for Startups — Tuesday, June 19th, 6-7:30 p.m. — For anyone looking to learn more about agile methodologies, lean software development and the lean startup methodology, this class is perfect. Taught by Microsoft’s Evangelist for Startups Abby Fichtner — known to the Twitterverse as @HackerChick — the class is focused on three key takeaways: how to use a kanban board to visually track and manage the work you’re doing; how to use scrum meetings to collaborate and ensure that you’re continually delivering value; and how to use hypothesis-driven development to validate & prioritize the features you’re developing.

HTML/CSS 101: Getting to Know The Face of the Web — Thursday, June 21st, 6-7:30 p.m. — Taught by Tom Boates,  the vice president of UX at RunKeeper, this class is designed to teach participants about basic page structure, the meaning of HTML tags and how to reference them in CSS, along with how to create a “basic, but beautiful” landing page.

Design for Developers — Monday, June 25th, 9:30 a.m.-5:30 p.m. — thoughtbot’s been hosting a series of workshops through Skillshare, including Introduction to Ruby on Rails. This workshop is aimed particularly at developers who want to better understand the language and practice of visual design. The only pre-requisite for the workshop is a solid working knowledge of HTML and CSS, and all of the workshops are being held at the “thoughtbot training room” on Winter Street, allowing students to get an inside peek at the company.

Step by Step Rapid Prototyping w/App Engine & Bootstrap — Thursday, June 28th, 6-7:30 p.m. — This intelligent.ly class is being taught by Aaron White, the co-founder and CTO of education startup Boundless Learning.

Become a CSS Ninja — Thursday, June 28th, 6:30-8:30 p.m. — Taught by Kevin Mandeville, a web designer at Yottaa, “Become a CSS Ninja” will help people learn how to maneuver their way around designing layouts, changing colors and fonts and more. Mandeville writes, “Be prepared to move from noob to ninja.” Being able to call yourself a ninja is more than enough reason to take this class.

Managing Innovation and Entrepreneurship — This graduate level OpenCourseWare class discusses “the basics every manager needs to organize successful technology-driven innovation in both entrepreneurial and established firms.” From how the innovation process works to designing appropriate innovation processes, this course is designed to make you a better manager.

Early Stage Capital — Knowing how to raise capital is important for every entrepreneur. In this graduate level OpenCourseWare class, students will be asked to consider several questions ranging from, “What should your strategy and your priorities be in raising early stage capital?” to “What are the critical negotiating strategies and tactics?”

And for fun.

Learn to Cook Gnocchi Like the Italians — Thursday, June 21st, 7-9 p.m. — After taking a course at the Culinary Institute of America that included the preparation of gnocchi, Babson student John Capecelatro now knows anyone can make the delicious dish. After all, he describes himself simply as “a business student who loves to cook.” No formal culinary skills required, although it might be a good idea to bring your own apron. This Skillshare class is also being co-taught with Emily Olson, who recently received her Master’s in Liberal Arts in Gastronomy at Boston University, and is a chef instructor at the Boston Center for Adult Education.

DJing 101 — Saturday, June 23rd, 2-3 p.m. — This Skillshare class continues to be one of my favorites. Taught by Boston University student Kevin Wang, you can learn how to beat match, mix, loop, edit or cue. Sound confusing? Well, that’s what Wang’s there for. From Top 40 to dubstep, Wang’s DJ’d at several venues around Boston, including The Estate, Caprice and The Middle East. He’s also played with various acts ranging from Animal Collective all the way to Passion Pit. So, keep your eyes peeled for this class. Wang will have the equipment at his apartment, all you need is to bring some sort of rhythm.

Bollywood Dancing 101 — Saturday, August 4th, 5-6 p.m. — This class is being taught in Central Square by Swati Tiwari, a trained Indian classical dancer who leads Boston Bhangra’s bollywood dance group Nazar. Looking to get your hips in motion without looking painfully awkward? This class could be your ticket there.