Hi Stephanie,

The scores achieved in an assignment completed on Khan Academy cannot be transferred to your Google Classroom and vice versa.

However, you can create a class in Khan Academy and import your Google Classroom roster. You'll be able to create assignments for your students, track their progress, get assignment reports, and more—all at Khan Academy.
Overall, you'll get the chance to coach them throughout their learning journey!

For more information on how to import your Google Classroom roster to Khan Academy, click here. I also encourage you to check out our step-by-step guides on our Teachers & Coaches Help Center, that way you'll be able to make the best out of your Khan Academy experience— click here.

Hope this helps!

Kind regards,