Nearly 8 percent of teachers leave the field every year, most of them before reaching the age of retirement. Many factors are responsible for this attrition, but research suggests a lack of teacher preparation, mentoring, and support are key contributors.

And while PD is a required part of the job, teachers need to feel like their time is well spent in order to get the most out of it for their students, their school, and themselves.

“It’s incredibly draining and demoralizing when you are trying to do something you’re deeply committed to, and you don’t feel like you can do it well,” says Elena Aguilar, founder and president of Bright Morning, which offers professional development coaching for schools.

The high turnover rate can also be costly for schools, which must invest in hiring new teachers to take their place. Making matters worse, fewer new teachers are entering the profession. But professional development that makes teachers feel more effective and appreciated can help stem this tide.

Discover five ways that K-12 leaders can retain teachers by helping them master their craft.