1. 
   instructional
   [adj] - of or relating to or used in instruction
   Found op http://www.webdictionary.co.uk/definition.php?query=instructional
   
   
2. 
   Instructional
   In·struc'tion·al adjective Pertaining to, or promoting, instruction; educational.
   Found op http://www.encyclo.co.uk/webster/I/71
   
   
3. 
   instructional
   adjective of or relating to or used in instruction; `instructional aids`
   Found op http://wordnetweb.princeton.edu/perl/webwn?s=instructional
   
   
4. 
   Instructional
   • (a.) Pertaining to, or promoting, instruction; educational.
   Found op http://thinkexist.com/dictionary/meaning/instructional/
   
   
5. 
   instructional
   1) Education 2) Of or relating to or used in instruction
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/instructional/1
   
   

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