Scaling up a business isn’t just saying yes to more work: it’s managing overhead, recruiting the right people, and sorting out great ideas from good ones. Danny Kerr has scaled up a lot of businesses: he started as a College Pro painter and had over 100 people working for him before he turned 21. Now he helps run Breakthrough Academy, a business school for tradespeople he helped found in 2015. There, he offers training on exactly the skills that take businesses from grassroots to large-scale, and this week, he shares his knowledge with us.