Teachers before students. When you roll out tech, ensure you give teachers an opportunity to learn about and use the tech, before you provide it to the students.
Don't require. Inspire. Do not require all teachers to accept and use the technology. Start with the teachers who are most excited. Ask teachers to write short and sensible proposals about how they want to use the tech. Empower those teachers to help guide others along.
If you deploy to grade levels, start with the older students. If you start with lower grades the upper grades will resent that they never had the opportunity to have access to the tech. If you start with the upper grades, the lower grades will be excited about what they have to look forward to.