To take the class officially, it is called “a non-matriculating student”. The cost per credit is usually less than the matriculating cost. In the US, many stat

To take the class officially, it is called “a non-matriculating student”. The cost per credit is usually less than the matriculating cost. In the US, many states offer workforce development grants that will pay for all/some of the costs to take the class officially as a non-matriculating student. Many employers in the US also subsidize such courses. Talk to your boss/hr.