Sentence:  The Illinois Commission for Handicapped Children , which for 20 years has had the responsibility of coordinating the services of tax supported and voluntary organizations serving handicapped children , of <WSD>studying</WSD> the needs of handicapped children in Illinois , and of promoting more adequate services for them , indeed welcomes this new important resource which will help the people of Illinois toward the goal of providing an education for all of its children . 
Meaning of the word marked with <WSD> tags:  consider in detail and subject to an analysis in order to discover essential features or meaning