Toilets remain one of humankindâs most ingenious engineering feats. But while the most advanced bidets can wash themselves (along with other parts), they canât fix themselvesâyet. Plumbing is just one of many good-paying skilled trades that remain in high demand but which have largely been glossed over by the education technology industry, says Doug Donovan, co-founder and CEO of Interplay Learning. âThereâs been a lot of great edtech serving the knowledge worker, such as tools like Pluralsight. But thereâs a vacuum in the digital marketplace for skills for hands-on workers.â His company has set out to create a digital education platform similar to Lynda.com, but focused on hands-on trades. And the effort is attracting some of the most active education investors that are venturing into skilled labor for the first time.