Lesson and unit updates are coming on June 13th, 2026.
We’re always listening to reviews, to what’s happening in classrooms, and to what teachers & students need most. With a growth mindset at our core, we continually fine-tune our lessons to reflect strong, research-based practices.
If you have any questions about an update, please reach out to our Customer Support Team.
- Mystery Science Kindergarten updates
- Mystery Science 1st grade updates
- Mystery Science 2nd grade updates
- Mystery Science 3rd grade updates
- Mystery Science 4th grade updates
- Mystery Science 5th grade updates
Supply updates summer 2026 - we kept it simple!
Alongside updates to our lessons, some activities and their associated supplies have also been updated. You can see a list of these updates at the link below:
| Want a printable summary you can share with your team or staff? You can get that here! |
Where did all the old lessons go? What was the old unit lesson order?
Already bought the supplies for an old lesson? Don’t worry, we saved you the link for now.
We’re always incorporating great teacher feedback to make our lessons more engaging, easier to prep, and more aligned to the latest best pedagogical practices, so we encourage you to check out the updated versions as soon as you can!