>> fast growth was the last thing new york city public school teacher paul edelman had to worry about when he started the company back in 2006. he launched the business to connect and support the education community by allowing teachers to share the innovative materials they were creating for their classrooms, like lesson plans. interactive notebooks and games. >> that lends itself well. reading different version was the three little pigs, okay? >> while everyone agreed, teachers pay teachers or tpt was a great concept, adoption was slow. the journey was a study in the three ps. patience, persistence and perseverance. there were highs, like the purchase of the company by scholastic and lows, after the acquisition, there was no growth. and the business almost closed down. in a last-ditch effort to keep the company alive, paul bought it back in 2009 to save the community and the business from obscurity. >> with almost 4 million active users, two out of every three teachers downloaded something from the site. and while it's no secret that teachers are notoriously overworked and underpaid