Magnetic Counters for School Maths Lab

Quick Answer: Magnetic Counters are small counters that cling to a magnetic whiteboard, giving the teacher movable objects for demonstrating number work to the whole class. Maths lessons use magnetic counters for ten frames, quick recognition of amounts, arrays, fractions of a set and simple probability.

Movable Objects on a Vertical Board

Counters on a desk are easy for a small group to see and hard for a class of forty to follow. Board counters move those activities to where everyone is looking. Drawn in a ten frame of two rows of five, seven counters read at a glance as five and two more, and eight as two short of ten. That quick recognition, called subitising, is the basis of mental strategies such as making ten to add 8 + 5.

Arrays come next. Twelve counters arranged in three rows of four can be read by columns as four rows of three, showing that 3 × 4 and 4 × 3 describe the same twelve. Because the arrangement stays on the board, students can come up, split an array with a ruler and show 12 as 8 + 4, which is the distributive property in picture form.

Fractions of a set follow. With 24 counters on the board, circling a third of them picks out 8, and two thirds picks out 16. If the counters come in more than one colour, the board also supports simple probability questions: what fraction of the counters are red, and how likely is a red one to be picked at random?

Applications

• Ten-frame work and subitising for early addition strategies
• Building arrays to show multiplication facts and the commutative property
• Splitting arrays to show the distributive property
• Finding fractions of a set, such as one third of 24
• Describing simple probability from coloured counters, where the set has more than one colour

Care & Handling

• Count the magnetic counters back into their box after each lesson; one left on the board edge soon slides off and goes missing.
• Keep the box out of reach of young children, as small magnets are dangerous if swallowed.
• Store the counters away from heaters, since heat can weaken magnets.

Specifications

Why Choose LabEquip

Teachers often pair the board set with desk counters such as the Counters Dia 30mm, so students copy each demonstration with their own pieces. LabEquip carries both within its Mathematics School Lab Products range; share your board type and class size through the LabEquip contact page.

Frequently Asked Questions

How are magnetic counters different from ordinary counters?

Ordinary counters are for students to handle at desks. Magnetic ones stay put on a vertical board, so the teacher can demonstrate ten frames, arrays and grouping for the whole class and leave the arrangement on display while students work.

How do counters on a ten frame help with addition?

A ten frame shows how far a number is from ten. With 8 counters in the frame, students see that 2 more fill it, so 8 + 5 becomes 8 + 2 + 3, or 10 + 3. This making-ten strategy speeds up mental addition.

How do counters show that 3 × 4 equals 4 × 3?

Arrange twelve counters in three rows of four. Read the same array by columns and it becomes four rows of three. The number of counters has not changed, which shows that multiplication can be done in either order.

How do counters help with fractions of a set?

Put out a set, such as 24 counters, and split it into as many equal groups as the denominator. One third of 24 means three equal groups of 8, so one third is 8 and two thirds is 16.

Can the board counters be used for probability?

If the set includes counters of different colours, the teacher can show proportions, such as 5 red out of 20, and relate them to the chance of picking red at random. Actual random draws are then done with desk counters in a bag.

Are these counters safe in a primary classroom?

They are meant for teacher-led board work. Small magnets can be dangerous if swallowed, so keep them out of reach of young children and count them back into the box after every lesson.

Last Updated: September 2026