Gradeable designs and delivers a digital grading tool for teachers to make formative assessment. Its tool allows teachers to use a document scanner, iPhone, or iPod touch to take their grading digital; grade open response questions digitally; keep a portfolio of student work; auto-grade multiple choice questions; use their current assessments; work with their existing gradebooks; track what students do/don't know by topic; and see the question-by-question analysis of student learning. The company is based in the United States.