Since you’re in a JEE dropper batch, it will definitely help with your board exams too because many JEE topics overlap with boards. However, JEE coaching focuses more on concepts and problem-solving, while boards need detailed theory, proper steps, and presentation. So, you’ll need to do some extra study for boards—like practicing answer writing, revising NCERTs fully, and going through sample papers. Manage your time well and give some weekly focus to board-style preparation too. Both can be done together.