I really feel like it's all about support within the teachers' classroom environment.
When introducing new tools or teaching methods to teachers in our school, I believe a good process looks like this:
1) Model Lessons - Admin, curriculum specialist, tech facilitator, or other teacher leaders go to classes and model the tool or strategy with students
2) Coteaching Lessons - Teachers work with above specialist to create a lesson that incorporates the tool or strategy being introduced. Both then execute this lesson with teacher's class(es).
3) Observe Lessons - Specialist observes teacher while they utilize the tools/strategies
After each step, reflection and discussion is a must. Talking about what worked, what didn't work, how the teacher might approach things differently, etc., is crucial to success.
It's also important to note that this should be done with just one tool or strategy at a time! Don't overwhelm teachers with more than one specific item to master at once or else you're bound to fail.