Learning Intention: Students will be able to accurately add two-digit numbers within 20.

Objectives: 1. Students will be able to identify and write two-digit numbers within 20. 2. Students will be able to break down two-digit numbers into tens and ones. 3. Students will be able to add two-digit numbers by comparing and combining tens and ones.

Materials: - Whiteboard - Whiteboard markers - Red and blue counters (30 of each) - Number chart (from 0 to 20)

Procedure: 1. Introduction (5 minutes): - Introduce the concept of two-digit numbers and how they are made up of tens and ones. - Display the number chart on the whiteboard and ask students to identify the two-digit numbers. - Demonstrate writing these numbers on the whiteboard.

1. Activity (10 minutes): - Draw two circles on the whiteboard. Label each circle with a two-digit number within 20 (e.g. 14 and 16). - Ask students to place 10 blue counters in one of the circles and 10 red counters in the other (or vice versa). - Ask students to combine the counters to find the number. - Ask students to write their answer on the whiteboard.

2. Conclusion (5 minutes): - Ask students to identify the two-digit numbers from the combinations made from the counters. - Ask students to explain the process they used to find the answer. - Wrap up the lesson and ask for any questions.