CoGrader

CoGrader turns the slowest part of teaching into a few minutes of review. You import an assignment from Google Classroom, Canvas, Schoology, Brightspace, Blackboard, or a plain upload of PDF, DOCX, or photos of handwriting. Then you attach a rubric — one from the built-in library of 500+ standards-aligned rubrics, or your own — and CoGrader scores every submission against that rubric, writing a comment for each criterion that tells the student what worked and what to fix next.

What separates CoGrader from generic chatbots is the evidence layer. The team publishes a validation study against official Texas STAAR raters where scores landed within one point of a human rater in 98.3% of cases and matched exactly 80.4% of the time, alongside an IES research award from the U.S. Department of Education and field studies in real districts. Teachers still approve every score and comment before students see it, so the AI drafts and the educator decides.

Beyond the core grader there is handwriting support that sorts scanned pages by student, an originality checker for plagiarism and AI-written text, a rubric generator aligned to state standards, class dashboards showing which criteria the whole class struggled with, and free tools students can use on their own essays. It is used by a reported 100,000+ teachers across 16,000+ US schools.