Additions to your Graph Theory image
Nedal,What is meant by the metadata source is indicated on the Template:Metadata page. In the example on the page, they say the source is either "private image or enter url of the source". There have been instances when I want to remember a bit more about how I created an image. In those cases I included a more detailed explanation. See my outlier image - click on the image to go to the page:
The description contains two links. Also note that I listed the source as "screencapture". I guess this implies private image, maybe I'll change it to "private image."
The only images that are recommended for wikieducator are those with open copyrights, CC-BY, CC-BY-SA, public domain, GNU Free Documentation License. Note that images with the Creative Commons NC indicator (meaning for non-commercial use only) should not be used in wikieducator. An explanation of "free content" is at What is free content. When I was learning about wikieducator a few months ago, I also went to the Creative Commons site to better understand these concepts.
There are a few websites with open copyright images. See the list at Wikieducator_tutorial/Images_and_Media/Tips for image sites that are searchable by keyword and copyright designation. I've used Flickr and Commons Wikimedia.
WE is also working on categorizing images. See the explanation at Category:Images. This is also a good place to look for images. Interestingly, I was uploading an image of visicalc (the first spreadsheet program) when it said the image already existed. Turns out it was the exact one from Commons Wikimedia that I was trying to upload. I hadn't thought to look first.
Lastly, I suggest naming images with very unique names. And if you see a notice that the one you are uploading is a duplicate, cancel your request and check out the image that already exists. If yours is different, then upload with a different name.
Yes, math is the same in all languages. And so are images. I'm glad you are braving the English language. I suspect that your English will get better the more work you do. Hope this explanation of images has been helpful.
Warm Regards, Alison
thanks, you were mauch helpfull with explaning metadata and copyrights .the most thing I like in WikiEducator that is I learn some thing new every time I working on .and I beleve that the future of education will be Wikki education but here in my country we faced many challenges with such education .
Warm wishes, Nedal