You have 3 templates available for use on the Preschool subsite: Preschool Index, Preschool Subpage Default, Preschool Subpage Fullwidth, and Preschool Event Template.

Because the templates are duplicated from your main site, everything should work similarly to how youre used to them working. There are link lists specific to the preschool site that control the Preschool logo, the footer links, the banners, the stories, and the social links that you can edit by going to Content > Link Lists in the CMS:

You will want to use the preschool templates for any pages on that site so that the navigation works properly. You will also need to assign all Preschool pages to the Preschool group. You can do this when you publish the page:

You will also want to publish events to the Preschool group the same way you publish pages.