The license I choose in my blog is known as “Attribution-Noncommercial-Share 4.0 International”. With this license sharing materials my blog, and copy and redistribute my materials in any medium or format. They can also be adapted materials, for example can be transformed, mixing and / or build on the material.
To share must consider the following aspects. First if changes are made, they have to indicate and retain an indication of previous modifications. Secondly they can not use my material for trade, that is for commercial purposes.
Thirdly and finally, if you remix, transform or expand my blog material must share my contributions under the same license as mine.
Sharing resources or materials is a great idea to learn from each other and improve ourselves. Because of that, our students can learn about the importance of copyright in order to find suitable materials for projects or jobs, not only for school but also for their future. So they come to learn that some images or resources that can be found in different sources require permission to be used. I think that a good way to do this is creating a debate to talk with them about what they worried about and what they like.
You can see my license in : https://exampleforthem.wordpress.com