I have been curious about the teacher pipeline in Maryland. So I did what I do when I have a question, I started looking for the available data.
So, I looked at the data published by the Maryland State Department of Education on the prior experience of new hires. According to the data, 58% (2,513) of newly hired Maryland teachers are new to teaching, 19% worked in another state (or the District of Columbia or Porta Rico) just prior, 13% worked in another Maryland county, 9% worked in a Maryland nonpublic school, and the remaining worked in another county or at the SEED School. This data set does not have information about the preparation of new teachers, so I do not know if they received their teaching training at a Maryland institution of higher education or in another state or country. When I have time I will look at other sources of data.