You do not need a binder. You need one sheet, one spot, and one test. Here is how to get from a blank page to a fridge that answers the phone number question for you at seven in the morning.
Local option: New Plan Care gives families in the St. Louis area in-home help so a parent can stay home: companionship, help with bathing and dressing, meals, and overnight care. Call (314) 405-0887.
Pick the spot
Choose the door of the fridge at each house, at eye height, where someone standing in the kitchen will see it without opening anything. Not the freezer door, and not inside. If the fridge front is smooth and metal, a magnet clip works. If the door is crowded with art and schedules, use a clear pocket with a strip of tape across the top.
Fill the blanks
Put only what a sitter, a neighbor, or a grandparent would need in the first minute: each kid's name and school, the school front office number, the family doctor's office number, the pharmacy number, the number of the adult picking up that day, a neighbor who has a spare key, and the full street address written out. Leave the medicine list to the family, the doctor, and the pharmacist. The sheet tells people who to call, not what to do.
Make it survive the week
Print two copies. Keep one on the fridge and one in the car, tucked in with the registration. Slide the fridge copy into a clear sleeve so a splash of yogurt does not erase the pharmacy number. Use a pen that does not run, or print it so the ink stays put.
Test the find
Ask someone who has never seen the sheet to find the school front office number, and time them. If it takes longer than ten seconds, move the sheet higher or make the heading bigger. Then ask them to find the number for whoever covers the afternoon. If they cannot find it, the sheet is decoration.
Name who updates it
Write one name at the bottom of the sheet: the person who changes a number when a number changes. Two houses mean two sheets, and two sheets drift apart fast. Put the update on the calendar at the start of every split week, so it happens on a day you already planned to be standing in that kitchen.