When creating an activity in Flint, you can supplement the AI's knowledge with additional materials. Flint will lean towards using the knowledge provided rather than its vast wealth of training data. Giving Flint content you have vetted and trust can help make sure it will explain concepts accurately and in a similar manner to how you would.

You can provide Flint with readings, quizzes, worksheets, presentations, student work, syllabi, rubrics, etc., to analyze and learn from, guiding its interaction with you and your students.

It's important to note, though, that knowledge of uploaded content stays within the activity or chat it has been uploaded to. If you open a new chat or activity, Flint won't have knowledge about previously uploaded content and you’ll need to share any relevant explanations and content with Flint again.

You can attach various information as:

Yes! With our February 4, 2026 update, Sparky can now read images in Powerpoints, PDFs, and documents (and even handwritten material!). This means that if you upload a presentation with a lot of images or a PDF that includes graphs and diagrams, Sparky will be able to read those images along with the text.

Make sure any links you provide are publicly accessible without any account setup needed. For example, the link to an article behind a paywall would likely not be accessible by Flint. If you’re ever unsure if Flint can read something, you can just ask for a summary of the content and see if its output is accurate.

The size limit on each individual piece of uploaded content is 24K words, about 100 pages double-spaced. You can upload around 16 large files/websites of this size into a singular activity. If your files are smaller, you'll be able to upload more than 16. Each upload cannot exceed the 100-page limit.

The size limit is a natural limitation of how much content state-of-the-art AI models today can accurately remember, and we're constantly updating Flint to increase this limit.

As you're building out your activity, you might want to add documents, photos, links, code, or math equations to enhance or update your activity. There are two ways you can attach additional items to your activity in your activity settings. You can either use "Build with Sparky" or "Build manually" to do so.