What is your strategy for upgrading the skills of your team?

"I consider developing the skill set of my team members one of my key obligations as a senior technical support engineer. At the beginning of each year, I create a development plan for each employee and review it. Elements of this plan include formal education, either online or in classes, mentoring by another senior support engineer or me, assigning them challenging tasks that will increase their skills, and asking them to present a brief training to their peers on a skill they need learn. I also seek their input on what skills they would like to develop and how they think they can do this. I monitor their progress against the plan quarterly and adjust the plan as needed."