2007 2015 Collaborative Learning Secondary 
Digital Promise
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When teachers receive well-designed professional development, an average of 49 hours spread over six to 12 months, they can increase student achievement by as much as 21 percentile points ( Yoon, Duncan, Lee, Scarloss, and Shapley, 2007 ).
The Learning Revolution Has Begun
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In the fall of 2007, Courtney went on to attend the University of Minnesota–Twin Cities as a first-generation college student. TESOL Instructor and Practicum Supervisor at Touro College, Founder and Managing Director at Virtual Exchange 4 Change | Cristina Zaccarini, Ph.D., Messiah College | Chesla Ann Lenkaitis, Ph.D.,
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