In training or learning courses with a limited budget and/or time, one best option can be the interactive flipping e-book, which converts the paper books or curriculum to well-designed e-book format with some interactivity elements (videos, 3D objects, or sound) for selected parts of the book to explain difficult concepts or help in practices.
![Interactive-eBook https://www.dosorx.com/wp-content/uploads/2021/01/Interactive-eBook.jpg](https://www.dosorx.com/wp-content/uploads/2021/01/Interactive-eBook.jpg)