1. http://www.ayna.com/search.ar.php?q=educatioal Research
database&o=0&h=10&z=&c=w
educational Research database
http://www.eric.ed.gov/
"problem-solving strategy
http://www.eric.ed.gov/ERICWebPortal/search/simpleSearch.jsp?new
Search=true&eric_sortField=&searchtype=keyword&pageSize=10&ERI
CExtSearch_SearchValue_0=Problem-
solving+strategy&eric_displayStartCount=1&_pageLabel=ERICSearchRe
sult&ERICExtSearch_SearchType_0=kw