The document is a letter informing ISSARA KANJUG that their abstract titled "The Design of Web-based Learning Environments enhancing Mental Model Construction" has been selected for presentation at the 4th World Conference on Educational Sciences in Barcelona, Spain from February 2-5, 2012. The letter requests the full paper be submitted by November 30th and notes the paper must be less than 5 pages or extra fees will be charged. It also states accepted papers will be published in the Procedia-Social and Behavioral Sciences journal and indexed in several databases if at least one author registers for the conference.