Lesson plans, grading, parent meetings, staff meetings, your own life. Here’s how to pick an iPad planner that can hold all of it — without turning planning into another prep task. Teachers don’t need another productivity app. You need something that keeps up with a day that starts before the first bell and somehow still isn’t over at 9pm when you’re answering a parent email from the couch. If you’ve searched for “best iPad planner for teachers” recently, you’ve probably…