Practice arithmetic just like Abe Lincoln, updated for the 21st century.Classroom Arithmetic? uses the entire touch-screen as a virtual slate for students to solve math problems longhand. Following the adage, “If you want to remember something write it down,” students write out their work as they solve complex, multi-digit arithmetic problems. It is a modern take on the traditional method of learning math: careful practice and working out problems.The benefits of solving math problems longhand include: * Improves learning by involving the fine motor control centers of the brain * Exercises the full range of steps required to solve arithmetic problems * Makes complicated problems more solvable * Rewards focus, care, and contentiousness, over rapid-fire answers and guess-work * Promotes attention-span * Creates a written record to review potential sources of repeat mistakesClassroom Arithmetic saves students’ work so educators can review it later. Parents and educat 更新内容： 优化体验，增强稳定性。