My hospital has a tuition reimbursement program for people taking college level courses (or above) leading to a degree -- up to a max of $2000 per year for full time employees. That's all that is promised.
Nurses attending conferences etc. can sometimes get some financial support. That is decided on a case-by-case basis. But only a few nurses per department are selected each year for that kind of support.
Nurses attending classes offered by the hospital are usually paid for their time if its an approved course -- though no set number of courses or hours is guaranteed.