Instead, let's use a variety of mechanisms to assess and constantly improve teacher performance.

WHITEHOUSE: Online Town Hall

And as you know, in the process that was conducted this summer there were, well, a variety of difference mechanisms at work.

WHITEHOUSE: Press Briefing

The reality is that we live in a world in which the evolved and savvy consumer is constantly inundated with information, has access to just about anything and demands a variety of content across multiple delivery mechanisms.

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