Go to the online store, the pictures of the online store are all in high definition, open a shopping software, search for the name of the teaching material, and then click the picture to save.

This software is called ocr software. Since you say it is best to use computers and scanners to extract pictures of books, if you only have a mobile phone, here are some mobile phone ocr software you have used:

1. Photo Universal Scanning King can scan the photos in books to extract them.

2. The ocr scanning function of Iflytek input method can only be used to scan text content, which is very convenient and powerful.

First, find the website and link of electronic teaching materials. To download electronic textbooks, you must first find a website or link where you can download electronic textbooks, and then you can enter the download.

Secondly, on the Internet, we can inquire about the download method, so that we can download electronic textbooks.