Here the word is a possessive form: our class's picture. However...
...the possessive is usually not used, and instead the word class becomes a noun adjunct : our class picture. So unless you are referring to a picture that belongs to the class, use the second form.
Classes.
"Classes" is the correct plural form of the word "class."
"Picture" in French is spelled as "image."
(das) Bild
learn how to spell classes
The anagram is "picture."
Computer
The correct spelling is "imagine" (to mentally picture).
The correct spelling is to "imagine" (conceive, picture).
No you bury it.
The correct spelling is "curriculum" (collection of instructional programs or classes).
To conceive or picture mentally is to imagine.