The curriculum doesn't have to be coming up in the next few weeks for a teacher to decorate a classroom with relevant objects.
In my preschool classroom, I hung up the Alphabet WEEKS before we ever went over any letters - because I wanted the children to be familiar with the letters.
Likewise, I hung up the color words, shapes, and the Seasons of the Year before we learned them - because the children learned them better if they had been exposed to them from the beginning.
And I left the Golden Rule posted on the wall ALL YEAR LONG, even though we went over it the first day of school - because the children remembered the material better if it was left in front of them to remind them.
As a homeschool teacher, I put up the Periodic Table, the Presidents of the United States, and Timelines all year long, long before the lessons are taught - because by the time my son gets to the lesson, he's already memorized part or all of the principal elements.
The idea that the only displays that can be allowed in a classroom are those that are BEING TAUGHT RIGHT NOW is just another example of how public education is failing the public's children -
adminstrators spend their time on garbage like this - micromanaging Geography Displays to make a political statement - instead of figuring out how to TEACH OUR CHILDREN.
So what if it wasn't coming up in the curriculm. Big deal. The students can still LEARN simply by seeing them in class.