Lexa uses Google's Gemini AI to power features like Ask Lexa, Lexa feedback, and revision pages. This article explains exactly how your data interacts with AI and addresses common privacy concerns.
Your Data Does NOT Train Public AI Models
This is the most important point: Your worksheets, student answers, and teaching materials are not used to train Google's public AI models.
When you use Lexa:
- Your content is sent to Google's Gemini API for processing
- Google processes the request and returns a response
- Google does not retain your data for training purposes
This is standard for the paid Gemini API tier that Lexa uses. Google's data usage policies for the API explicitly exclude training on customer content.
What Data Is Sent to AI?
Different features send different data:
| Feature | What's Sent | Purpose |
|---|---|---|
| Ask Lexa | The worksheet content + student's question | To provide contextual help |
| Lexa Feedback | Student's answer + rubric (if provided) | To generate constructive feedback |
| Revision Pages | Teacher's knowledge base content | To create study materials |
| Metadata Extraction | Worksheet content | To identify questions, topics, and skills |
How Long Does AI "Remember" Your Content?
AI processing in Lexa is transient:
- When you submit a question, the AI processes it and returns a response
- We store the result (the feedback or answer) in our database
- The AI context is cleared after each interaction
- There is no persistent "memory" of your content on Google's servers
What We Extract and Store
From AI analysis, we extract and store:
- Topics and skills identified in worksheets (to power progress tracking)
- Feedback text generated for student answers
- Revision content generated from your materials
This extracted data stays within Lexa and is subject to the same security protections as all your other data.
Teacher Knowledge Base
When you upload materials to your knowledge base:
- Files are stored securely in Google Cloud Storage (your region)
- Content is indexed to enable semantic search
- Lexa can reference your materials when helping students
- Your materials are never shared with other teachers or students outside your classes
Student Privacy
For students:
- Only their teacher can see their work and Lexa-generated feedback
- Students cannot access other students' data
- AI interactions are logged for quality and cost tracking, but not exposed to third parties
Pro Tip: You can delete any worksheet or knowledge base file at any time. Deletion removes both the file and any associated processed content.