Best AI-Powered Feedback Tools for Students in Secondary Schools
Effective feedback is one of the most powerful influences on student progress—but delivering it consistently and personally across dozens (or hundreds) of pupils is a major challenge. Fortunately, a new wave of AI-powered tools is helping teachers in secondary schools provide faster, more detailed, and more targeted feedback across a range of subjects. In this article, we compare the best AI feedback platforms available to teachers and schools in 2025.
1. Graded.Pro – Best Overall for Subject-Specific Feedback
Graded.Pro delivers AI-generated feedback for student work across all subjects, from short maths answers to extended English essays. It supports typed and handwritten submissions, and teachers can edit or override the AI’s responses. Voice and text annotations allow for a personal touch, and a viva-voce tool checks authorship if needed.
- Feedback tailored to subject and task type
- Supports diagrams, structured work, and free-form writing
- Fully teacher-controlled before release to students
- Used by over 1,000 schools globally
2. Scribo AI – Best for Writing Feedback
Scribo AI specialises in literacy and writing. It analyses student drafts and gives feedback on structure, grammar, clarity, and tone. Teachers can review and customise suggestions, and students can revise based on the tool’s comments.
- Great for essays, narratives, and reports
- Works well in English, History, and Humanities
- Integrated into Google Classroom
- Promotes multiple drafts and improvement
3. Diffit – Best for Reading and Vocabulary Feedback
Diffit provides differentiated reading texts and vocabulary lists, adjusting content to student reading levels. It also includes comprehension questions with automated feedback. Ideal for inclusion and EAL students, or classes with wide ability ranges.
- Adjusts reading material for KS3 and KS4 levels
- Built-in feedback on vocabulary and comprehension
- Useful for science, geography, and citizenship reading tasks
4. Khanmigo – Best for Student Self-Guided Feedback
Khanmigo, developed by Khan Academy, acts as a student-facing AI tutor. While not teacher-controlled in the same way as others on this list, it provides instant feedback to students in maths, science, and grammar exercises. Teachers can track usage and progress.
- Instant formative feedback for learners
- Aligned with Common Core and GCSE-equivalent material
- Still in pilot phase in many regions
5. Brisk Teaching – Best for Inline Feedback in Google Docs
Brisk is a Chrome extension that allows teachers to highlight text and receive AI-powered feedback suggestions directly inside Google Docs. It’s best for teachers who want control over comments while speeding up the process.
- Ideal for coursework and longer writing pieces
- Feedback appears within students’ own documents
- Customisable tone and style of comments
AI Feedback Tool Comparison – Secondary Schools
| Tool | Best For | Subjects Supported | Student Visibility | Teacher Control |
|---|---|---|---|---|
| Graded.Pro | Personalised subject feedback | All subjects incl. Maths, English, Science | ✅ Yes (post teacher approval) | ✅ Full control |
| Scribo AI | Essay and writing feedback | English, History, Humanities | ✅ Yes | ✅ Customisable |
| Diffit | Reading comprehension support | Cross-curricular reading tasks | ✅ Yes | 🟡 Limited |
| Khanmigo | Self-guided feedback | Maths, Science, Grammar | ✅ Yes (real-time) | ❌ No |
| Brisk | Commenting in Google Docs | Essay-based subjects | ✅ Yes | ✅ Moderate |
Final Thoughts: Choosing the Right AI Feedback Tool
The best AI-powered feedback tools for secondary school students combine speed with insight, giving students timely comments while allowing teachers to maintain oversight. Graded.Pro remains the most comprehensive solution across subjects, especially where handwritten work and diagrams are involved. For writing-rich subjects, Scribo AI and Brisk offer subject-specific support.
Used well, these tools not only save teacher time—they help students become more reflective, independent learners who understand how to improve their own work.