Changing demographics of teachers
She notes that the last generation of teachers was made up primarily of women who entered teaching with few other career options at a time when lifetime employment was the norm. In contrast, teachers today have a number of career options available to them and don't see teaching as a long-term commitment.
Further, many teachers entering the profession today - 35 to 40% by Moore Johnson's account - have previous professional experience and are entering the teaching workforce as mid-career professionals. Since these teachers have been in a professional environment, they have different expectations in areas such as collaboration, authority, and career advancement.
To me, this is a fascinating new variable to add to the education reform mix. If teaching changes from a lifetime decision to become one stop in a string of positions, I believe that teachers will have more power to demand change: their threshold for institutional pain will be lower, and the fact that they're willing to walk should force schools to become more accommodating to them. I don't mean this in a traditional union-vs-school sense of negotiating over work hours and bonus pay, although that will certainly be a factor; rather, it could/should go deeper, to altering root-level issues that impact how pleasant and professional teaching is as a career.
This is doubly important with a wave of retirements coming up - interesting to see what happens!