Wind-Up Dual-Scale Fiberglass Tape Measure, 100 ft. / 30 m Glassware Educator-designed: Classroom-tested for clarity

Educator-designed: Classroom-tested for clarity

a classic cymatics demonstration that turns sound into striking patterns

Why Teachers Love the Concave Mega Mirror

Map the Balmer series with hydrogen's visible emission lines

The Laser Ray Box and Lenses set lets students see light paths instantly and investigate reflection

Wind-Up Dual-Scale Fiberglass Tape Measure, 100 ft. / 30 m Glassware Educator-designed: Classroom-tested for clarityA durable ABS plastic housing, ergonomic design, and high contrast markings will make this your go to measuring device for years to come. The thick, nylon reinforced fiberglass tape stretches for 100 feet or 30 meters, with standard and metric units on opposite sides.