Measuring with Blocks: A Preschool Nonstandard Measurement Game

Measuring with blocks in preschool gives length a visible unit. Use identical suitable blocks to find how many fit along an object. The activity invites comparison while showing why the arrangement of units matters.

Choose equal units and a clear object

A book or small safe play surface can be easier to measure than an irregular object. Lay the first block at one end and continue in a straight line. Explain that gaps and overlaps change the result.

Use age-appropriate materials and avoid measuring across walking paths or near equipment that needs to stay clear.

Talk about the process

• Are the blocks the same size?
• Do they start at the end of the object?
• Is there a space between these two?
• How can we remember the result?

Count the units together if useful, but do not let a counting challenge hide the comparison itself. The child can also notice which object needs a longer row.

Compare with the same unit

Measure a second object using the same blocks. If you switch to a different size, discuss why the number may change. Avoid presenting different unit counts as directly comparable without explaining the units.

An adult can record the child's words beside a drawing. The record should describe what was actually measured.

Do units have to fit exactly?

No. Say "about" when appropriate and describe the remaining space. The purpose is exploring measurement, not producing false precision.

Should we introduce a ruler immediately?

Follow the child's interest and classroom approach. The block activity can stand on its own as a concrete comparison.

For more about the age-based classroom, explore the Children’s Land preschool program and find a Chicagoland location. Bring your child’s interests and questions to a conversation about current routines and learning experiences.

Related reading: Setting the Stage for Early Math Skills in Preschool.