Spectrum K12 School Solutions Inc., a Towson, Md.-based provider of special education and IEP management software, has raised $5.7 million in Series B-1 funding, according to a regulatory filing. Backers include Novak Biddle Venture Partners and Updata Partners. Past backer Warburg Pincus is not listed on the filing, but lists Spectrum K12 as a portfolio company on its website. www.spectrumk12.com