A professional development session focused on turning student data into actionable instructional plans through root cause analysis and collaborative planning.

Review of all teen number concepts and a final formative check-in.

Formalizing the relationship between teen numbers and equations of the form 10 + n.

Solving simple story problems involving teen numbers using the 'ten and some more' structure.

Using visual models to compare teen numbers and determine which is greater or less.

Introduction to unitizing: seeing 10 ones as 'one ten' using bundles and towers.

Breaking apart teen numbers into 'ten' and 'some more' to prepare for equation work.

Connecting concrete counters to drawings and visual models for all teen numbers.

Using double 10-frames to quickly identify and build any teen number from 11-19.

Focus on the final teen numbers 18 and 19, emphasizing how close they are to two full 10-frames.

Students explore the structure of 16 and 17 as a full 10-frame and extra ones.

Students build on the 'ten and some more' concept specifically for 14 and 15, introducing the double 10-frame visual model.

Students are introduced to the concept of 'ten and some more' focusing on the numbers 11, 12, and 13 using 10-frames and counters.