There are three ways to lock the background on your Digital Notebook so that students may not alter or modify it: A) You can bring your worksheet (or image) into Google slides as a jpeg and make it "background." This works well if you already have a worksheet that you want to use in your digital notebook. Insert the jpeg while in Google slide edit mode. B) You can also create your worksheet in a Power Point, then download it as a png or jpg file format. C) You can also create your own worksheet while in Google Slides: go to "slide" and then "edit theme." Your worksheet will be locked - students can not alter or modify it. You can easily move back and forth between your slide show for students and "edit theme."
Students may not move pieces around while they are in "present" mode. They must be in "edit" mode. But, they can view their final produce in "present" mode. Also, any links that you place into your theme are active only in "present" mode and not in "edit" mode. For example, if you want to create tabs on your digital notebook, you tab links will not work in "edit" mode but will work once in "present" mode.
Be sure to teach students how to use the "undo" button and ctrl, "z."
Simple Tutorial on basic Drop-and-Drag in Google Slides (8 minutes)
More Advanced Tutorial on Drop-and-Drag in Google Slides (20 minutes).
Notice on the tutorial above how you can create duplicate items to be moved. This works well in math classes. And it is very clever. Starts at 16:28. In other words, when a student moves a "1" to a box, there are multiple "1s" still under the box that you have moved.
Free Digital Notebook Templates - slidesmania.com/tag/notebook-style/
Free Digital Notebook Templates - slidesgo.com/notebook
Free Digital Notebook Templates - pinterest
Very Low Cost Digital Notebook Templates from - Teachers Pay Teachers
Fifty (50) Free Digital Notebook Templates for Teachers from - Ditch-That-Textbook