Photo translation help please...

[Adrian]

I have several photos from the estate(s) of the crew of U-406. There is writing on the back of a few and they are pictured below. If anyone would be good enough to translate any of the writing I would be very grateful.
Thank you for any help in advance.
Photo 1....

[Adrian]

Photo 1 reverse....

[Adrian]

Photo 2....

[Adrian]

Photo 2 reverse....

[Adrian]

Photo 3....

[Adrian]

Photo 3 reverse....

[Adrian]

Photo 4....

[Adrian]

Photo 4 reverse....

[Tim DC]

Hello Adrian

#2: Kriegsjahr 1941. Geweidnet zur steten Erinnerung. Dein Freund und Kamerad, Willi Schmidt.

#3: Begrussung der Lehrer durch den A(d)miral (Direktor rechts) (Amiral in Gespräch)

#4: Danzig, 12th of October 1941. Zum Andenken an deinen Freund Franz.

[Adrian]

Thats great Tim, thank you very much for your help, much appreciated.