As federal lawmakers in Washington continue to slow-walk — or outright oppose — the legalisation of marijuana, the budding industry is plowing ahead making crucial inroads with another institution of prestige to help lend it legitimacy: higher education.

Five universities — three public state schools and two private Catholic colleges — have partnered with cannabis education company Green Flower Media to roll out first-of-their-kind online certificate programmes beginning in June, The Independent has learned, with roughly two dozen other accredited higher education institutions also considering partnerships.

Despite the Drug Enforcement Administration (DEA) listing cannabis as a Schedule I drug off limits for sale and use by the public, 11 states plus Washington, DC, have legalised recreational marijuana, and 33 other states have approved its medicinal use.