Fraction Strips

Choose a mode

The top strip is given. Build the bottom one: set the number of saw-cuts with denominator −/+ and the colored pieces with numerator −/+ (or drag: right = more colored pieces, up = more cuts), so it is the same SIZE as the top strip but with a different number of pieces. The balance levels when the two fractions are equal. Then press Check

3D math game · Best for grades 3-4

Fraction Strips

Fraction Strips puts two wooden strips side by side and a balance between them. The top strip shows the target fraction; your job is to build a bottom strip that is the exact same length but uses a completely different denominator — the concrete definition of equivalent fractions.

What students practice

Equivalent fractions are the gateway to adding unlike denominators and simplifying fractions. Fraction Strips makes equivalence physical: you feel the balance tip and level as you adjust, so the concept is not abstract arithmetic but a visible, physical equality.

  1. Read the fraction shown on the top strip.
  2. Use the denominator -/+ buttons to set how many equal sections to cut the bottom strip into.
  3. Use the numerator -/+ buttons (or drag right/left) to shade the right number of sections.
  4. The balance levels when the two strips are the same size — then press Check.

How to use it at home or in class

The top strip shows 1/2. You can balance it with 2/4, or 3/6, or 4/8 — every combination that levels the scale is an equivalent fraction. Seeing several solutions on one screen turns a memorized rule into a felt relationship.

Students sometimes reproduce the target fraction exactly (same numerator, same denominator) instead of building an equivalent with a different denominator. The game requires a different denominator, so that shortcut is blocked and real search begins.

Use it for individual practice, paired work, or a short class demonstration before worksheets.

Start with the game above, then continue with written practice to reinforce the skill.

Common questions

How is Fraction Strips different from the other three fraction games?
Fraction Strips is the only one focused on equivalent fractions — building a new fraction that equals the target with a different denominator. The other three games are about understanding a single fraction.
Which grades is this game for?
It suits grades 3-4, once students understand what a fraction represents and are ready to compare fractions and find equivalent forms.
How does the balance help learning?
The balance gives immediate visual feedback: it tips when the strips are unequal and levels when they match. Students can experiment freely without guessing — the balance shows the truth.