An important visual  aid in geography lessons is the collection of minerals and rocks. With this a  piece of reality gets into the classroom through which nature can be beheld  directly. Student can touch and hold them. 
          The electronic  collection of minerals and rocks does not substitute the direct demonstration  of nature but has a number of advantages. 
          If it is used,  there is no need to carry the heavy bits to the classroom. Even those rocks can  be shown which are missing from the school’s collection. If the projector is  connected to a computer, the students can view the material in projection, and enlarged  if required. 
          
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