Guidance : To extract the folders named after a particular chapter, first d ownload the file by clicking on the name of the chapter. (if download option is missing, go to File menu and find Download option) Thereafter, unzip or extract the folders using any zipping utility . (Rate of downloading depends upon how fast your internet connection is. On Android (most of the smart phones), you may not be able to see the progress of downloading the zip file. Here, you need to remain patient. However, on a PC, you will be able to see the progress of your downloading. Use a pendrive or any other mechanism to copy the extracted folder to the smart boards installed in your school if you are not directly downloading on the smart board in the first place. On most Windows machines, a zip extractor will be already installed. On an Android, Google Files will do the job. Otherwise you may use ZArchiver after installing it from the Play Store) Inside t h e folders, you will fin...