Specifications include, but are not limited to: The WLS is acting on behalf of the nine Washington State Educational Service Districts and their schools and school districts in releasing this RFP. Authorized Vendors of products are invited to provide proposals for an Optional Use contract to be considered by the Washington Learning Source (WLS) for the purpose of providing its members competitive pricing: Language Acquisition Software: An online program for K-12 students or adults that supports students at a beginning level of English and/or to achieve foreign language proficiency within the district in French, Spanish, German, Japanese, Chinese, English as a second language and introduction to world language. All materials must reflect 21st century skill sets.