Bill Gates: Grade teachers

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The entrepreneur turned philanthropist says measuring the effectiveness of teachers is vital to creating better schools.http://feeds.feedburner.com/~ff/rss/cnn_us?d=yIl2AUoC8zA</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=QHSVKOLDo_M:qa-w0H8fdsM:yIl2AUoC8zA) http://feeds.feedburner.com/~ff/rss/cnn_us?d=7Q72WNTAKBA</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=QHSVKOLDo_M:qa-w0H8fdsM:7Q72WNTAKBA) http://feeds.feedburner.com/~ff/rss/cnn_us?i=QHSVKOLDo_M:qa-w0H8fdsM:V_sGLiPBpWU</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=QHSVKOLDo_M:qa-w0H8fdsM:V_sGLiPBpWU) http://feeds.feedburner.com/~ff/rss/cnn_us?d=qj6IDK7rITs</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=QHSVKOLDo_M:qa-w0H8fdsM:qj6IDK7rITs) http://feeds.feedburner.com/~ff/rss/cnn_us?i=QHSVKOLDo_M:qa-w0H8fdsM:gIN9vFwOqvQ</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=QHSVKOLDo_M:qa-w0H8fdsM:gIN9vFwOqvQ)
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