Each year I make sure our students see the connections between what we do in my room (art) and what they are studying in their classrooms. Here are a few examples. 
2nd grade - Pirate Treasure Map 
Using Geography and creating a Map Key 
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| 6th Grade Ancient Egypt Work | 
| 6th Grade Japanese Brush Painting - Ink on Rice Paper Connection - Studying ancient cultures  | 
| 2nd Grade Planetary Art Connection - Studying the solar system in science  | 
| 2nd Grade - Plant Parts Pastel | 
| 5th Grade - Drawing a corner of Chicago Connection - Chicago history, the great Chicago fire, and the rebuilding of modern Chicago  | 
6th Grade Tessellations (Geometry) 
Connection - Learning to manipulate the area of a square  |