According to DivineScience.info until the late 20th Century, Divine Science had a strong institute in Denver. Today the main training center in the United States is the Divine Science School. in Washington D.C.
Globally there are a number of other institutes that offer studies in Divine Science, but none of these institutes have attained a review by DivinitySchool.net so we cannot recommend any of them at this time.
When searching for New Thought Education, we recommend that you first go to DivinitySchool.net before making a decision. Some institutes like the Denver School have fallen on hard times, others do not have proper online studies programs.