The Homepage of Skole theme has a section with four sliders and a numbered list:

You can edit the list text and slider images by following the steps below:

Step 1. Click on the "Edit with Elementor" link in the WordPress toolbar, then locate the section and click on it:

Step 2: You can edit here the Tabs' titles: 

"Home-like Environement"

"Safety and Security"

"Quality Educators"

"Play to Learn"

Step 3: You'll notice that the Tab's description is an Elementor Template shortcode:

Remember the template id (for instance id="3894"), then go to Dashboard > Templates > Saved Templates and locate each of the tabs templates and click on "Edit with Elementor":


Step 4: Here you can customize the slider's content: