Rekenrek by mathies play online

The Rekenrek tool helps to build a deeper understanding of number concepts and relationships.

Mathematical Concepts:

Make visual models that help explore mathematical thinking related to:
\tunderstanding number relationships using anchors of 5 and 10
\trepresenting numbers in different ways, composing and decomposing numbers
\tsubitizing (instantly seeing how many)
\tcounting principles
\tunderstanding addition and subtraction
\tdeveloping multiplicative thinking
\tvisualizing division facts

Features:

\tAdjust the number of rows.
\tChoose a background colour and bead colours.
\tDrag the rods to compare values.
\tHide beads with one of the two resizable shades. Shades can be repositioned to focus attention.
\tCommunicate your thinking or highlight various features of your representation using the pencil button.