ACEABLE, which offers a mobile app for driver’s ed courses, has raised $4 million in a Series A round led by Silverton Partners and Floodgate Ventures. The Austin, Texas-based startup, which claims more than 35 percent market share for online driver’s ed courses in Texas and California, has now raised $8.7 million, according to Crunchbase. Founded in 2012, Aceable plans to to expand its content to cover skills related to real estate, human resources, nursing and food safety industries.