Improvement is a universal concept meaning to make better in health care through the use of BEST evidence which refers to guidelines, reviews, meta-analyses, consensus/position statements and expert opinions. Improvement can be applied interdisciplinary or trans-disciplinary. International professional organizations foster the use of evidenced-based education and practice (IOM, 2003; STTI, 2005; NLN, 2005; AACN, 2003). This trans-disciplinary evidenced-based improvement (EBI) model can be used to promote a more optimal caring healing environment (OCHE). The purpose of this paper is to illuminate the use of the EBI model to improve the health care environment. Specific aims are to describe Langley et al., (1996) improvement model and transformative/self-regulated theories of learning to show one approach to evidenced-based education. A second aim is to discuss the BEST evidence available on various ways to improve the environment. Learner outcomes evidence ample EB literature to suggest how nurses can make a difference in promoting a more OCHE. Results of the EB education processes promote improved writing, thinking critically and use of EB literature. Implications are global in that all health care environments are in need of improvement via best evidence.