Go to the Teacher licensing website to apply: 

Scroll down to Substitute License applications.

Be sure to read Short-Call Substitute Teaching License Guidance before doing anything.

If you are applying for a 3 year short call substitute license, click on the link for Online Licensing System.

If you are a retired teacher wanting to get a short call substitue license, you can possibly get a lifetime short-call license.  Click on Renew My License .

Carefully follow the directions on the website.