Gridfinity 4x4 Baseplate

168.0 x 168.0 mm

Standard 4x4 Gridfinity baseplate (168 x 168 mm). Holds modular trays securely on student desks and stacks into classroom kit boxes.

Fraction studio

125.5 x 125.5 mm

3x3 Gridfinity bin (125.5 x 125.5 x 84 mm). 9 floor sockets. Wall height guides show 1/9, 1/8, 1/7, 1/6, 1/5, 1/4, 1/3, 1/2, 1 whole.

Fraction blocks / 45 stackable pieces in 9 towers

126.0 x 126.0 mm

Standard 1x1 Gridfinity footprint (41.5 x 41.5 mm). 45 blocks across 9 vertical towers (1 to 1/9). Heights 84/n mm. Vertically stacked with sacrificial tear-off supports on a single build plate (126 x 126 mm).

Numeral tiles / 30 pieces

208 x 128 mm

Three copies of digits 0-9. Digits debossed 0.6 mm deep into top face. Fit fraction tray entry wells.

Stack stage

125.5 x 125.5 mm

3x3 Gridfinity stage (125.5 x 125.5 mm). Inset debossed lettering. Gridfinity base on underside.

Stack value tiles / 4 blanks

84 x 88 mm

Blank reusable value tiles (76.8 x 16.8 mm) for the Stack Stage register wells. Compatible with writable film or paper inserts.

Expression tree

167.5 x 125.5 mm

4x3 Gridfinity tray (167.5 x 125.5 mm). 7 token wells (23 mm diameter) with connecting branch lines and postorder labels debossed 0.6 mm deep.

Tree tokens / 7 pieces

108 x 58 mm

Seven 22.4 mm diameter tokens (3.0 mm thick). Characters debossed 0.6 mm into top face.

Coordinate lab

167.5 x 167.5 mm

4x4 Gridfinity plate (167.5 x 167.5 mm). 100 blind sockets (4.4 mm dia x 2.2 mm deep). Inset lines and numbers; Gridfinity base on underside.

Locator pegs / 4 pieces

56 x 16 mm

Four locator pegs. 3.8 mm stems fit 4.4 mm sockets. Debossed center pip on flat heads.

01 / THE STACK

85.6 x 53.98 mm

CR80 format (85.60 x 53.98 mm). 1.4 mm thick with 0.4 mm debossed text.

02 / BUILD A FRACTION

85.6 x 53.98 mm

CR80 format (85.60 x 53.98 mm). 1.4 mm thick with 0.4 mm debossed text.

03 / MEASURE DISTANCE

85.6 x 53.98 mm

CR80 format (85.60 x 53.98 mm). 1.4 mm thick with 0.4 mm debossed text.

Fit first

92 x 48 mm

Test coupon with 4.0, 4.4, 4.8 mm sockets. Verify printer tolerance before printing full boards.

Double Ten-Frame stage

167.5 x 83.5 mm

4x2 Gridfinity Double Ten-Frame tray (167.5 x 83.5 mm). 20 quarter-width (21 mm) sockets arranged as Frame 1 (1-10) and Frame 2 (11-20).

Number bond stage

125.5 x 83.5 mm

3x2 Gridfinity number bond stage (125.5 x 83.5 mm). Part-Part-Whole wells. Directly embodies RPN: Part 1 in Y, Part 2 in X; addition evaluates Whole in X.

Number rack

167.5 x 83.5 mm

4x2 Gridfinity number rack / Rekenrek (167.5 x 83.5 mm). Two rows of 10 beads grouped in 5s. Teaches doubles (n ENTER +) and near-doubles.

Ten-frame mini-blocks / 20 pieces

106.0 x 86.0 mm

Quarter-width (21 mm pitch) Gridfinity mini-blocks (20.5 x 20.5 mm, 7.0 mm height = 1U). 20 stackable blocks for the Double Ten-Frame.