Features

Everything you need to evaluate writing at scale

Purple Crayon helps instructors, TAs, and program leads give rich, rubric-based feedback without spending every evening buried under essays.

Built for real classrooms and real grading workflows

From first-year writing courses to upper-year seminars, Purple Crayon keeps your feedback consistent, transparent, and fast — across assignments, sections, and semesters.

Instant AI feedback

Upload drafts and get immediate suggestions on clarity, structure, and mechanics, tuned for academic writing instead of generic spell-check.

  • • Works with essays, reflections, lab reports, and more
  • • Highlights strengths and concrete next steps

Rubric-based scoring

Align AI feedback with the criteria you already use in class. Score each dimension and reuse rubrics across courses and semesters.

  • • Custom evaluation schemas and rubrics
  • • Criterion-level comments and rationales

Built for instructor & TA teams

Share evaluation schemas, align on rubrics, and keep feedback style consistent across large courses with multiple graders.

  • • Shared schema library for your program
  • • Consistent language and scoring across sections

Classes, folders, and cohorts

Organize evaluations by class, assignment, or cohort so you can quickly find past feedback and see how students are progressing.

  • • Nested folders for courses and sections
  • • At-a-glance view of recent evaluations

Saved evaluations & exports

Store evaluations in one place and export scores and comments into your LMS or gradebook with minimal copy-paste.

  • • Downloadable reports for each submission
  • • Export-friendly comments and scores

Privacy and instructor control

You choose how AI is used in your course. Keep control over rubrics, scoring, and how feedback is presented to students.

  • • Instructor-controlled prompts and rubrics
  • • Clear boundaries around what AI can and can’t do

See these features on your own assignments

Spin up your first evaluation schema, upload a sample essay, and see how Purple Crayon handles your real rubric and writing tasks.