by nicholasjevans | Oct 22, 2019

Material Ten green metal plates each with circular red insets. One inset is whole.The other circles are divided into 2, 3, 4, 5, 6, 7, 8, 9 and 10 equal parts.Each segment has a knob. One set of tickets labeled:12 tickets of 1/23 tickets of 1/3 4 tickets of 1/4Etc....
by nicholasjevans | Oct 22, 2019

Material Seven racks, each containing ten test-tubes.Three racks are painted white for the simple family:One with green beads for units.One with blue beads for tens.One with red beads for hundreds. Three racks are painted grey for the thousands family:One with green...
by nicholasjevans | Oct 21, 2019

Material A large bead frame similar to the small bead frame, but with seven horizontal wires representing categories up to units of millions. Notation paper similar to the small bead frame, but this paper has vertical lines from units up to units of millions....
by nicholasjevans | Oct 21, 2019

Material Seven wooden solids representing the following hierarchical values:1: a green cube of 1/2 cm x 1/2 cm x 1/2 cm 10: a blue prism of 1/2 cm x 1/2 cm x 5 cm, divided into equal parts by free lines to that each section represents the preceding value (one) 100: a...
by nicholasjevans | Oct 21, 2019

Material A fame with a support that allows it to stand.There are 4 wires across, each with 10 beads.Green beads on the first (top) wire, for units.Blue beads on the second wire, for tens.Red beads on the third wire, for hundreds.Green beads on the fourth wire, for...