> For the complete documentation index, see [llms.txt](https://iog-academy.gitbook.io/plutus-pioneers-program-fourth-cohort/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://iog-academy.gitbook.io/plutus-pioneers-program-fourth-cohort/lectures/lecture-02/lesson-01.md).

# Lesson 2.1: Low-Level, Untyped Validation Scripts

Welcome to Lesson 2.1! In this lesson, you'll learn about how untyped validation scripts works.

{% embed url="<https://youtu.be/3tcWCZV6L_w>" %}

{% tabs %}
{% tab title="Learning Objectives" %}
After completing this lesson, you'll be able to:

* Describe how on-chain validation works.
* Launch and explore the Plutus documentation from the Docker Container and Demeter terminal.
* Code and compile a simple smart contract.
  {% endtab %}

{% tab title="Additional Resources" %}
To learn more about the topics covered in this lesson, we encourage you to review the following resources:

* [What is a smart contract?](https://docs.cardano.org/new-to-cardano/what-is-a-smart-contract)
* [What's the difference between "on-chain" and "off-chain" in plutus smart contracts?](https://cardano.stackexchange.com/questions/219/whats-the-difference-between-on-chain-and-off-chain-in-plutus-smart-contrac)
* [Concurrency and all that: Cardano smart contracts and the EUTXO model](https://iohk.io/en/blog/posts/2021/09/10/concurrency-and-all-that-cardano-smart-contracts-and-the-eutxo-model/)
  {% endtab %}
  {% endtabs %}

## Collaborate with the Pioneers Community

Remember that you can interact with the participants of the PPP through the [IOG's technical community on Discord](https://discord.gg/inputoutput) by joining the channels under the Plutus Pioneers category.

If during the program you have questions about Plutus, we invite you to share them at [Cardano Stack Exchange (CSE)](https://cardano.stackexchange.com/) by adding the `plutus-pioneer-program` tag to your question. The IOG's Education Team members will monitor these questions to support your learning journey. Whenever you share a question at CSE, you're helping to build up the Cardano and Plutus development knowledge base.

***

This work is licensed under a [Creative Commons Attribution 4.0 International License](http://creativecommons.org/licenses/by/4.0/).

<figure><img src="https://i.creativecommons.org/l/by/4.0/88x31.png" alt="Creative Commons License BY 4.0"><figcaption></figcaption></figure>