Lesson objective: Apply understanding that two two-digit numbers can be compared using the symbols < or >.

This lesson provides an opportunity for students to apply their knowledge and understanding of using symbols to compare numbers to a mathematical situation. Students are asked to count amounts of fish in the game Ocean World, compare their number with a partner's number, and record their comparison using symbols.

Key Concept students will use:

- Symbols can be used to compare numbers.

Skills students will use:

- Apply understanding of the greater than and less than symbol and use symbols appropriately.
- Ability to compare two two-digit numbers based on meanings of the tens and ones digit. (Grade 1, Unit 8)
- Understanding that the two digits of a two-digit number represent amounts of tens and ones. (Grade 1, Unit 8)

Students engage in Mathematical Practice #2 (reason abstractly and quantitatively) as they critically think about the relationship between quantities, using flexible thinking of mathematical symbols.

**Key vocabulary: **

- compare
- determine
- digit
- less than
- greater than
- ones
- tens

**Special materials needed:**

- base ten blocks
- connecting cubes
- Ocean World cards