FOR RELEASE SUNDAY, JANUARY 19, 2014, AT 12:01 A.M. CST.-Student Noah Riddle, 11, completes his worksheet while petting Tango a 4 year old Leonberger in D'Nae Wilson's Mutt-I-Grees Class at Levelland Middle School Wednesday Jan. 15, 2014. Wilson uses the dog to help teach the class. (AP Photo/Lubbock Avalanche-Journal, Stephen Spillman)
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