This is a different type of Wolfram Demonstration Project: Interactive Worksheets. This interactive worksheet provides unlimited practice for responsible learners of all abilities and backgrounds to master surds simplification. 
Do you think this is a valid Demonstration Project? (see surds.nb attached). Can someone help me to fix it, please? There is a parsing error at the point of uploading. 
My notebook dragedropv1.0.nb is attached as the ultimate reference.
				
					
				
				
					
					
						
							
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