When publishing content on your school wiki or blog, it’s important to make sure you have the right to use other people’s images. Taking photos directly from a google search is definitely not good practice and may result in legal issues in the future.
Luckily there are websites that offer images under a creative commons license or provide the use of images with a referral link to the original creator.
Here are a few websites I recommend as a starting point. They all allow you to search and download images without having to sign up. Using any image usually requires you credit the creator and provide a referral link to their work.
Flickr is another good source of images, once you learn how to search for photos which offer the appropriate license.
Search via the link above and select the (see more) link next to the attricution license.
Below is a very handy webpage that gives you an embed code to place flickr images on your wiki or blog, with the appropriate creative commons details attached.
If you know of any other good places to find royalty free images that don’t cost an arm and a leg, please share them via the comment box below.