Most of the students have got the idea of the teens down quite well. They drew a card with a teen on it and built a structure using that many wooden cubes.
Here are photos from some of them.
At the end are two photos of wooden bead patterns. Some students are moving beyond the simple ABAB pattern and exploring more complex patterns. Sam shows an ABC pattern. I'm seeing students come up with lots of AABB patterns. It's enjoyable to observe the students as they progress naturally to increasingly complex patterns.