The question, Louise, invites the comment -'That depends on the law within your jurisdiction'. Clearly you are talking about the law where you live. If that follows the general principles about the law relating to copyright that, generally, are the same across a lot of the world, then the answer to your question is, probably, 'No, you would not be infringing copyright'.
You are not using this for commercial purposes, unless you are using it part of a training course for which you are charging a fee.
In the strictest sense, making a copy of the image; i.e. copying it onto your computer could be construed, in some places, as infringing copyright. But, we are living in the real world. Any photographer who puts his or her images online knows that they will (if they are any good) be used by someone for something. A photographer of repute is not going to pursue any action against you for making a copy for the purposes you have stated in your message.