Many Practices Adopted to Some Degree. When we consider those charities and congregations that say they have adopted these practices to some degree, however, we get a different picture. Except for the uncommon practice of outcome measurement among congregations, all nine items are practiced by a majority of charities and congregations at least to some degree. For example, although only 25 percent of charities say they offer training and professional development opportunities for volunteers to a large degree, another 49 percent say that they offer these opportunities to some degree. This leaves only 26 percent of charities that say that they offer no such opportunities. Larger Charities Invest More in Volunteer Management. Adoption of.