Open Educational Content/olcos/Tutorial1 Use Open Content/Modification of ODEC

If you intend taking a resource and changing it, you have to search for ODEC that has the following licenses:

• Resources from the public domain
• Resources under the GNU FDL, but with restriction that the endproduct has to be publisehd under the same license, even if the new product is used commercially.
• All Creative Commons licenses with reuse option. Careful, all resources licensed with "no derivates" can not be modified for own purposes.