> For the complete documentation index, see [llms.txt](https://docs.siminsights.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.siminsights.com/skillful/simulations.md).
# Simulations
Search and filter the catalog, check a simulation runs on your devices, and open it.
Over a thousand simulations, free to browse at [platform.siminsights.com/skillful](https://platform.siminsights.com/skillful) whether or not you have an account.
## Finding one
Pick a subject category, or search by name. Five filters sit above the results:
| Filter | Narrows by |
| ----------------- | ----------------------------------- |
| Category | Subject area |
| Variant | Guided, Unguided or Timed |
| Platform | The devices it runs on |
| Grade level | The school grades it is written for |
| Learning standard | The standards it maps to |
## Checking it fits your class
A simulation's page describes what the learner does, and lists the same facts you filtered by:
* **Category**, the subject.
* **Grades** it was written for.
* **Variant**: Guided walks the learner through each step, Unguided leaves them to work it out, Timed puts them under a clock. For younger students, or anyone new to VR, Guided is the safer choice.
* **Standards** it maps to.
**Share** copies a link to the page, for sending to a colleague.
## Running it
**Plays on** lists the devices the simulation runs on. Check it before you build a class period around one: not every simulation runs everywhere.
{% hint style="info" %}
**MR** simulations need a mixed reality headset. They will not open on an ordinary VR headset or in a browser.
{% endhint %}
Then there are two ways in, depending on whether one person is going in or the whole class at once.
**On your own.** Press **Launch simulation**, then pick how to play: in the browser, in the Windows app, on a headset by entering a pin code, or on an iPad. Leave it a moment and it starts whichever suits the device you are on.
**With a class.** Press **Assign group session**, then **Start session**. Everyone joins the same run with a five-digit code, and you watch them from one page. See [Group sessions](/teach/group-sessions.md).
If the button reads **Buy simulation**, please login with an account that has access to Skillful. See [Access and pricing](/skillful/access-and-pricing.md).
## Trimming the list on your devices
HyperSkill on a headset or desktop lists the whole catalog, which can be overwhelming for a student.
[**Settings > Skillful**](https://platform.siminsights.com/settings/skillful) narrows it. Tick the variants, categories, grades and standards you want, then save. Nothing is lost: clearing the tags brings the full catalog back, and the website always lists everything.
The filter belongs to your account, so it follows you onto any device you sign in to. It does not change what anyone else sees.
