Will Carington, works for Noodle
According to the Icahn Charter Schools website, the school uses the Core Knowledge Sequence Curriculum, which includes four major subject areas: English Language Arts, Mathematics, Science, and Social Studies.
Unfortunately, I wasn't able to find detailed information about the exact topics, etc., covered in fourth grade. My advice would be to contact the school directly at (718) 828-6107 for further information.
Hope this helps!