Vlada Lotkina noticed something wrong at her daughter’s school. So she built the solution and sold it for 8-figures. It’s called ClassTag, and it’s a platform where teachers, parents and school administrators can communicate and send out announcements. No flyers, no ridiculously long emails… My favorite part is that she’s a Mixergy listener herself. She literally called a previous guest of mine and got him to invest before her business took off. Vlada Lotkina is the co-founder and C...