Compare written numbers 1-10. Use the language less, less than, greater, greater than. Conclude by leading this investigation.

Comparing numbers on the number line by Khan Academy

Comparing numbers to 10 by Khan Academy

Conclude by giving your students this challenge:

2021 Math Kangaroo Levels 3-4 Problem #23: Elena wants to write the numbers from 1 to 9 in the squares shown. The arrows always point from a smaller number to a larger one. She has already written 5 and 7. Which number should she write in the box with the question mark?

Here's the solution.

K.CC.C.7: Compare two numbers between 1 and 10 presented as written numerals.