Note: There is no video for this lesson because of the nature of the lesson. In this lesson, the teacher directs the students in using a rekenrek. The first page of the "problem set" is actually directions for the teacher. The second page is a recording sheet.
Thanks to Kristin Arwood. Video by Teaching Independent Learners. https://www.youtube.com/channel/UCELqg9AdEu9zTof1qFv99MA