Students can use the shortcut to reverse image search on their iPads ONLY if they are using Google Chrome as their browser. Chrome isn't automatically installed on their iPads, so students will need to go to the App store to download it.
#1 - Tap and hold your finger on the image you would like to search.
#2 -This menu will pop up. Tap on "Search Google For This Image".
On a Mac, you can quickly conduct a reverse image search by right-clicking (control-click) on the image. You'll see the option to "Search Google for Image.
If you don't see the option to "Search Google for Image" when you right-click, check these two things.
#1 - Make sure you are using Google Chrome as your browser.
#2 - Check that Google is set as your default search engine. (see screenshots below)