These teachers stand out — and raise eyebrows. They integrate the latest technologies into their classrooms. They have popular Facebook pages, Twitter accounts and blogs. They score lucrative speaking gigs at conferences on educational leadership. These are the high-profile classroom teachers that companies like Apple, Microsoft, Google and Amazon court with freebies — everything from gift cards to iPads and free access to premium classroom software — and they are igniting debate about corporate-infused pedagogy. Should you encourage your teachers to seize such opportunities or forbid them from fraternizing with Silicon Valley elites?