Everyone vs. Every One
The pronoun everyone may be replaced by everybody. It is used to refer to all the people in a group.
The new protocols will affect everyone positively.
The new protocols will affect everybody positively.
Written as two words, every one refers to each individual who makes up a group, and means each person.
My mother would like to thank every one who offered assistance during her illness.
My mother would like to thank each person who offered assistance during her illness.
For emphasis, you can also add each to the sentence:
Students may excel if each and every one is treated with dignity and respect.