Rekenrek
Bridges Learning Resources on Rekenrek
From Bridges: Learning to Think with the Rekenrek and Supplementary
Rekenrek App (from Math Learning Center, called Number Rack)
Videos:
Math Solutions Number Talk Using the Rekenrek
Hand to Mind: What the heck is a rekenrek?
GFletchy: Rekenrek (an Intro)
GFletchy: Using Rekenrek in the Classroom
Top 5 Rekenrek Activities by Christina Tondevold
Math Rack Activities by Christina Tondevold