Most tools mark answers wrong. RemedyHub Pro finds out why. Upload a photo of a worksheet and the AI names the misconception behind the mistakes, along with the skill and grade level to fix. From there it builds a differentiated lesson plan, a printable practice worksheet with an answer key, and Khan Academy links for that exact gap. Parents get a private progress link with no login. Group Diagnostics sorts several students into 3 skill tiers. Free for 7 days, no card needed.