Writing requests for proposals (RFPs) can be daunting and confusing. But a well-written RFP for state assessment services can save the potential client and potential bidders many headaches in preparing a bid and in evaluating bids. A well-written RFP can also save clients and vendors from difficulties of a poorly-specified contract and vague costs for scope increases or decreases. A well-specified contract can help clients maintain a comfortable working relationship. This RFP development Toolkit is the result of the author’s work in which he was responsible for developing RFPs and resulting contracts in a difficult political climate as a State Assessment Director and as a consultant for several other states. This toolkit is intended to ease the process of writing an adequately specified RFP and of developing an adequately specified resulting contract.