Which word is used to talk about each item in a small group, focusing on them one by one?

When you want to talk about all the items in a large group, or something that happens regularly, which word do you use?

The teacher gave a sticker to ____ student. (Choose the best word for a small class where she sees each student.)

We have a spelling test ____ Friday. (This happens regularly.)

There are two apples. ____ apple is red. (Focusing on each one.)

____ child in the park was playing happily. (Referring to all children in a large group.)

My mom cleans the house ____ Saturday. (This is a routine activity.)

He bought a new toy for ____ of his two dogs. (He focused on each dog separately.)

The museum is open ____ day of the week. (It's open all days.)

Which word is usually followed by a singular noun?

Which word is usually followed by a singular noun and refers to all members of a group, often in a routine?

I read a chapter from ____ book on my shelf before bed. (This implies reading from all the books.)

My sister has three dolls. ____ doll has a different dress. (Focusing on each doll individually.)

The school bus picks up students ____ morning. (This is a daily routine.)

There are five pencils in the box. ____ pencil is sharpened. (Focusing on each pencil.)

We celebrate holidays ____ year. (This happens annually.)

The team members celebrated ____ victory. (This implies each member felt the victory.)

You should brush your teeth ____ time you eat. (This is a general rule.)

The artist painted a portrait of ____ person in the room. (Assuming a small number of people.)

Which word emphasizes looking at all items as a single group, often implying a large number or a routine?