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All Humidity Is Relative
Is that a rubber chicken you're swinging above your head? No, it's a sling psychrometer from Sper Scientific! You're not exorcising that science class, you're teaching them basic concepts and elemental weather measurement! You've filled the small reservoir that wets the wick attached to one of the two thermometers in the plastic 9" x 2" x 5/8" device. You've spun it above your head by its fold-out handle like a New Year's Eve noisemaker. You've calculated the difference in temperature between the two thermometers and consulted the enclosed chart to determine the relative humidity. Three times. Now you can tuck it back in its slim canvas shoulder pouch, acknowledge their wide-eyed admiration, and start telling them about burying that string under the light of a full moon....
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92465 SLING PSYCHROMETER |
Overhead Insides
Biology and anatomy teachers, nursing and medical staffs, anyone who stands up and explains the human body will love this high-quality, full-color set of (38) 8-1/2" x 11" medical transparencies. Our each is a set that includes pretty much the human contents, anterior and posterior, and systems, including vertebrae, sacrum, hand, foot, shoulder, knee, hip, elbow, assorted skin pathologies, heart, ear, eye, sinuses, stomach, rectum, lung, liver, gallbladder, kidney, prostate and breast cancer classifications, among others, many showing attached musculature. From GPI Anatomicals.
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37323 BODY TRANSPARENCIES |
SHIP SHAPE
Teach your preschooler shapes and spatial relationships with this wonderful European toy. Fold together the sturdy 6" cube in primary colors. Page through the (4) geometrically-shaped, heavy cardboard booklets which are filled with matching pictures - like the sailboat in the triangle book or the clock in the circle book - then drop them into the cube through die-cut geometric openings. Originally $14.99, this is a real find.
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32372P1 LEARN YOUR SHAPES | |
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32372P36 LEARN YOUR SHAPES BULK |
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