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STEM Projects & Olympiad Lab

120 hands-on experiments, engineering builds, and Olympiad-inspired challenges for Grades 1 to 12.

10 projects for Grade 3

Grade 3
BuildBeginner

Paper Bridge Challenge

Engineering, Science · Structures, Engineering

Fold a flat sheet of paper into a bridge and test how many pennies it can hold.

30 to 45 min · 6 materialsView project
Grade 3
ExperimentBeginner

Fingerprint Detectives

Science · Biology, Data Analysis

Lift fingerprints with cocoa powder and tape and sort them into arches, loops and whorls.

35 to 50 min · 6 materialsView project
Grade 3
Math ChallengeBeginner

Fraction Strips Puzzles

Math · Number Sense, Geometry

Fold paper strips into halves, thirds, fourths and more, and use them to compare and match fractions.

35 to 55 min · 5 materialsView project
Grade 3
Math ChallengeBeginner

Measure and Estimate Like a Pro

Math, Science · Measurement, Number Sense

Guess lengths, masses and volumes first, then measure them, and see how close your estimates can get.

30 to 45 min · 5 materialsView project
Grade 3
Math ChallengeBeginner

Multiplication Array Puzzles

Math · Number Sense, Geometry

Use rows of counters to see multiplication, and discover why 3 times 4 equals 4 times 3.

30 to 45 min · 3 materialsView project
Grade 3
ExperimentIntermediate

Pulley Lift Challenge

Science, Engineering · Machines, Physics

Lift a load with a fixed pulley and a moving pulley and measure how much easier each one makes the job.

40 to 60 min · 6 materialsView project
Grade 3
ExperimentBeginner

Rolling Race: Which Surface Is Fastest?

Science · Physics, Measurement

Roll a toy car down a ramp onto different floors and find out which surface slows it the most.

30 to 45 min · 6 materialsView project
Grade 3
BuildBeginner

Rubber Band Guitar

Science, Engineering · Physics, Engineering

Make a guitar from a box and rubber bands and discover how to make higher and lower sounds.

35 to 50 min · 5 materialsView project
Grade 3
ExperimentBeginner

Soil Sleuths: Which Soil Drains Fastest?

Science · Earth Science, Environmental Science

Pour water through sand, clay and garden soil and find out which one lets water pass through fastest.

35 to 50 min · 8 materialsView project
Grade 3
Math ChallengeBeginner

Tangram Shape Challenge

Math · Geometry, Logic

Cut a tangram puzzle into seven pieces and rearrange them to make animals, houses and shapes that share the same area.

30 to 45 min · 3 materialsView project

EduVistaHQ.com · Learn • Explore • Grow. Olympiad-inspired activities are practice for the skills those competitions use. EduVistaHQ is not affiliated with Science Olympiad or any other competition organization.