If you have previously given your consent for your photographs to be used for teaching or publication, but have now changed your mind and do not wish for them to be used, you should inform the individuals or organization who have the photographs that you no longer wish for them to be used.

If the photographs have not yet been used, your request should be honored and they should not be used. If the photographs have already been used, it may be more difficult to retract them, especially if they have been published in a public forum. However, you still have the right to request that they be removed, and the individuals or organization should make a reasonable effort to comply with your request.

It's important to note that consent for the use of photographs is typically obtained through a written agreement or release form, so it's important to carefully read and understand any agreements you sign before giving your consent. If you have concerns or questions about the use of your photographs, it's always a good idea to seek legal advice or consult with the individuals or organization using the photographs.

If you have given consent for your photographs to be used for teaching or publication, but later change your mind, you should contact the organization or individual who obtained your consent and inform them of your decision. They should respect your wishes and remove your photographs from any future use in teaching or publication. It's important to note that if your photographs have already been used in teaching or publication, it may not be possible to retract their use retroactively. However, you can request that they no longer use your photographs in any future projects.