The phrase "elementary level" refers to something that is basic or easy to understand. It is like the starting point or foundation of learning about a particular topic or subject. Full definition
A great time - filler or revision exercise for elementary level students to help them identify what food comes from what country. (tes.com)
Some of the statements are not appropriate discussion starters for elementary level students; select an appropriate statement that will engage your students. (educationworld.com)
Now he has it at its most elementary level. (si.com)