There are different rules for using images depending on what you want to use them for.

If you want to add images to a report or poster that will only be seen in school, you can freely use any image with the Educational Purposes Licence.

If you are publishing e.g. on a blog, you can only use images with the permission of their owners.

ALWAYS ALWAYS ALWAYS
credit the owner of the work you want to use.

You can read more about copyright here. 

Check with Mrs Macfadyen if you are unsure.

Images – for any use, including online
Cooltext This site lets you make your own graphics. Great for banners and headings. You have to save your work or it will be lost. Read copyright information carefully	Flickr Commons A collection of photographs from public collections around the world. Read copyright information carefully
Pixabay Photographs. Read copyright information carefully	Openphoto Photographs. Read copyright information carefully
Wikimedia Commons Multimedia materials with Copyleft licences. Read copyright information carefully