Teachers call books published by Heinemann their bibles. The company's products are in schools all over the country. Some of the products used to teach reading are rooted in a debunked idea about how children learn to read. But they've made the company and some of its authors millions. Map: Heinemann’s national reach Read: Transcript of this episode Watch: The story behind Sold a Story Organize: Sold a Story discussion guides Support: Donate to APM Reports Listener survey: Tell us about yourself More: soldastory.org Dive deeper into Sold a Story with a multi-part email series from host Emily Hanford. We’ll also keep you up to date on new episodes. Sign up at soldastory.org/extracredit .