My room is shared with a grade 6 class. Sometimes we cross paths before/after lessons and sometimes they see what we are doing in Grade 8 and Algebra 1 on the board. We have a lovely relationship - with them leaving me a plate of homemade treats after one of their classes!
One afternoon after their class I returned to my room to see Grade 6 graffiti! It totally made me smile - never underestimate what students take in! From the graffiti they have been paying attention to what I have been leaving on the board and what they classified as further mathematics! What a fun lovely graffiti to discover!