This math aid helps students who are blind and visually impaired comprehend abstract numerical concepts.The number line is a basic tool for teaching number concepts, number sequence, counting, addition, subtraction, multiplication, division, rounding, estimating whole numbers, common fractions, and decimals.
The Common Core State Standard for Mathematics (2102) references number lines for teaching mathematical concepts. The standards range from representing whole number sums on a number line at the elementary level, to representing fractions at the intermediate level, to locating irrational numbers at the middle school level.
The Number Line Device consists of three parts: a blue plastic base with storage compartment for number lines and pegs, 15 interchangeable vinyl number line segments in large print and braille, and 40 plastic cylinders/pegs with an arrow formation on one end that may be used by older math students as they graph lines and rays.
Number Lines Included:
0-20 by ones
0-200 by tens
0-100 by fives
-10 — +10 by ones
Halves
Thirds
Fourths
Fifths
Sixths
Eighths
Fractional tenths
Decimal tenths
Unnumbered with 10 coordinate scale marks
Unnumbered with 20 coordinate scale marks
Unnumbered with no coordinate scale marks
Also included is a large print manual and a CD-ROM with manual in accessible file formats. Print and braille versions of the manual are available as a free download at www.aph.org/manuals
WARNING: CHOKING HAZARD – Small Parts. Not intended for children ages 5 and under without adult supervision.
