2-Color Desktop Abacus 10-Row Abacus
Use this updated version of the ancient tool to teach basic math skills, including counting, addition, subtraction, patterning, grouping and place value. Features plastic beads on metal rods for easy sliding. Mounted securely on a sturdy plastic base. Activity Guide included. Measures 9"L x 4"W x 83
⁄4
Grades K+ SMALL PARTS (1). Not for < 3 yrs.
LER 1323 $17.99 "H.
Desktop model features a frame that is thicker than the beads, which allows abacus to lie flat on student desks. Abacus activities offer students tactile counting practice and visual reinforcement of math facts. Includes 10 rows of 10 beads in 2 colors grouped in 5s for ease of use. Abacus measures 81
⁄2 "L x 1 LER 4335 $12.99 ⁄2 "W x 91 ⁄2
Grades K+ SMALL PARTS (1). Not for < 3 yrs.
"H. Weighted Numbers
Teach number sense, greater than/less than, odd and even numbers, and beginning operations with these color-coded numbers. Each is weighted in 5 g increments (5 g–50 g) and features a number word spelled out on the back. Numbers 1–10 measure 3"L x 1 2"H. Grades PreK+ C A
⁄2
Reinforces key algebraic concepts
LER 2049 Weighted Numbers Set of 10 $16.99
LER 1521 Primary Number Balance $17.99
LER 1521
"W x
Math Balance Positive & Negative Number Line Activity Set
Hang to visually demonstrate number and operations skills, then lay flat for kinesthetic center activities. Reinforces positive and negative numbers, operations and algebraic equations. Shows -25 to 25 horizontally on one side and vertically on the reverse to prepare students for the orientation of Cartesian coordinates. Includes 2 magnetic arrows for highlighting numbers, 2 inflatable vinyl cubes (5" each) for equation building and 10 double- sided, reproducible Activity Cards with answer key. Use with wet-erase marker. Sturdy vinyl number line with grommets measures 48"L x 8"H. Grades 4+ C
SMALL PARTS (1). Not for < 3 yrs. LER 7696 $26.99 86
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As children manipulate the balance and weights, they gain insight into abstract number and operations concepts, algebraic equations and more. Set includes 81
⁄2 LER 0100 $19.99 "H
balance, twenty 10 g weights, labels and Activity Guide. Grades 3+
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