AI Grading for Google Classroom
Grade an entire class set in minutes, not hours. ClassLens connects directly to Google Classroom to grade student submissions with AI, write personalized feedback, and give you back the time grading takes away.
Built by a teacher with 22 years of classroom experience. Not a tech company guessing at what teachers need.
You Already Know the Problem
You teach five periods. Each class has 30-plus students. A single written assignment generates 150 submissions. At 10 minutes per paper, that is 25 hours of grading for one assignment.
So you make trade-offs. You assign less writing. You give shorter feedback. You push grading to weekends and late nights. You know you could be a better teacher if you were not drowning in a stack of papers every week.
The average teacher spends 9.9 hours per week on grading. Teachers who try to give personalized feedback on every submission are looking at 40-plus hours a week on grading alone. That is not sustainable. It never was.
ClassLens exists because the teacher who built it spent 22 years making those same trade-offs and finally had the tools to fix it.
How ClassLens Works with Google Classroom
ClassLens is not a generic AI tool that happens to support Google Classroom. It was built from the ground up for teachers who live in Google Classroom every day. The entire workflow stays inside the ecosystem you already use.
Step 1: Connect Your Google Classroom
Sign in with your Google account. ClassLens imports your courses, assignments, and student submissions directly from Google Classroom. No CSV uploads, no copy-paste, no switching between platforms.
Step 2: Configure Your Grading Preferences
This is where ClassLens is different from every other AI grading tool. You control the grading, not the AI.
Set your preferences before each grading job:
- Strictness level — Grade leniently, moderately, or strictly. You decide the bar.
- Feedback style — Choose between encouraging, balanced, or direct feedback tones.
- Feedback length — Brief comments or detailed paragraph-level analysis.
- Late work policy — Define how late submissions are handled: full credit, percentage deductions, or zero credit. The AI applies your policy automatically.
- Rubric criteria — Upload your rubric and the AI evaluates each submission point by point against your standards. Not arbitrary ones.
Your preferences are saved and applied to future assignments. Set it once, adjust when you need to.
Step 3: Review and Return
ClassLens grades every submission and saves the results as drafts in Google Classroom. Nothing reaches your students until you approve it.
Review the AI-generated grades and feedback at your own pace. Make adjustments where you see fit. Then return grades to students with a single click, or export everything to Google Sheets for your records.
The AI is the assistant. You are the authority.
What Makes ClassLens Different from Other AI Grading Tools
Most AI grading tools treat Google Classroom as one integration among many. ClassLens treats it as the foundation.
Read more about how ClassLens surfaces class-wide knowledge gaps.
After every grading job, ClassLens aggregates the results across your entire class and generates a Knowledge Gap Report. This tells you what your students understood, where the common misunderstandings are, and which concepts need re-teaching. No other AI grading tool does this.
A veteran AP History teacher grading DBQs needs a different standard than a first-year teacher grading reading responses. ClassLens adapts to the teacher, not the other way around. Strictness, feedback tone, feedback length, late work handling are all configurable.
Essays, short answers, lab reports, handwritten work (photographed or scanned), CAD drawings, student-drawn graphs, PDFs, slides, and multi-file submissions. If a student can submit it to Google Classroom as a document, image, or PDF, ClassLens can grade it.
Assignments import directly with no manual setup. Grades write back as drafts in Google Classroom. Student submissions are processed in place. The workflow matches what you already do.
Student Privacy Is Not an Afterthought
If you are a teacher, you know that using a new tool means asking about student data. ClassLens was designed from the start with FERPA compliance built into the architecture.
- Transient processing: Student submissions are downloaded, graded, written back to Google Classroom, and discarded. No student data is stored on ClassLens servers.
- Google Cloud Vertex AI under the Cloud DPA: your data is never used to train Google’s foundation models.
- AES-256 encryption: All sensitive data is encrypted at rest and in transit.
- Teacher-initiated only: Nothing happens without your explicit action.
- School/district authorization: Student data is only processed after proper authorization is in place.
- Data Privacy Agreement ready: ClassLens supports district-level DPAs for formal procurement.
You should not have to choose between using AI and protecting your students. With ClassLens, you do not have to.
Built by a Teacher, for Teachers
ClassLens was not built in a Silicon Valley office by engineers who have never been inside a classroom. It was built by Steven Swanson, a teacher with 22 years of experience who grades 150-plus papers every week.
The features in ClassLens exist because they solve problems Steven faces in his own classroom. Knowledge Gap Reports exist because he wanted to know what his class was missing. Configurable strictness exists because formative check-ins and summative essays require different standards. Draft mode exists because no responsible teacher wants AI sending grades to students unsupervised.
This is a tool built by someone who uses it. Every design decision reflects real classroom experience, not market research.
More on this in our post on the ethics of AI grading.
The Time You Get Back
Here is the math for a teacher with 150 students.
Manual Grading
25 hours
150 papers at 10 minutes each
With ClassLens
~7 hours
AI grades in minutes, review at 2-3 minutes each
Time Saved
18+ hours
Per assignment cycle
Teachers who use AI tools weekly save an average of 5.9 hours per week, the equivalent of six full weeks per school year. And that is the average. Teachers with large class loads save significantly more.
Get Started in Five Minutes
ClassLens requires no installation, no downloads, and no IT department involvement to try.
Sign in with Google
Use your Google account (personal or Workspace).
Select an assignment
ClassLens imports your courses and assignments from Google Classroom.
Set your preferences
Choose your strictness, feedback style, and late work policy.
Grade
ClassLens processes your submissions and saves grades as drafts.
Review and return
Check the AI's work, make adjustments, and return to students.
The free plan includes 100 submissions per month. No credit card required.
For a deeper walkthrough, read our complete guide to automated grading in Google Classroom.
Ready to Grade Smarter?
Stop spending your evenings and weekends buried in papers. ClassLens gives you AI-powered grading that connects directly to Google Classroom, respects your standards, and gives you back the time grading takes away.
Free plan available. No credit card required. Set up in under five minutes.
ClassLens is also available for school districts with volume pricing and admin controls.