Combines mathematics, geometry and aesthetics into a magical motion of surprising simplicity, beauty and fun. Its system of polymer links expand and contract almost effortlessly, changing in volume 30 times. A sturdy toy, an object of art, a tool for teaching mathematics and science - the Hoberman Sphere's universal appeal and versatility have led its owners to discover uses even its inventor never dreamed of. Children love to wear it on their heads, or climb inside. Grown-ups have proved themselves no less inventive: jugglers juggle with them. Drill teams march with them. Magicians make magic with them. Teachers teach geometry with them. Motivational speakers use them as metaphors for unity, teamwork and expanding potential. Ages 4 and up. Expands from 9.5" to 30".
Pre-mixed with water in 32 oz. spray bottle. 90% Propylene Glycol, 9% Ethylene Glycol Phenyl Ether, and 1% Diethylene Glycol Phenyl Ether. In addition, this solution is an effective humectant. Using this holding solution ensures that your specimens stay moist, flexible, and mold-free.
Equilateral. 45mm side. Has one hole for adding fluids to study refraction and dispersion.
Equilateral. 45mm side. Has one hole for adding fluids to study refraction and dispersion.
Adjustable 360 degrees jaw rotation. For attaching up to 1/2" diameter rods. Aluminum muff with steel thumbscrew.
Clamp with Hook can be rotated and locked in any position. Ideal for supporting suspended thermometers, drying tubes, etc. The clamp attaches to rods up to 13mm (1/2") O.D.
For suspending pulleys, balances, etc. from support rods, or cross members.
Plated steel collar clamps feature thumbscrews and hooks for suspending pulleys, balances, etc. from support rods or crossbars. For suspending pulleys, balances, etc. from 3/4 inch support rods, or cross members.
Features flat countersunk bottom, with a double-ended hooked rod through the middle. Can be used on balance pans, as well as hooked in tandem for lever arm studies. Made of polished brass.
1" horseshoe magnet with keeper. Lifts two pounds.
Learn what air pollution is and how weather and geography affect it. Conduct experiments to test the air that you breathe everyday for pollutants. This kit comes complete with instruction manual, the chemicals and apparatus needed to conduct several air quality tests.
Find out what pollutes drinking water and how it can be made safe again following pollution. Conduct experiments on the chemicals and organisms that make water unsafe to drink and conduct an experiment on its purification. Learn the causes and effects of water pollution.
Teach your students basic problem-solving skills! Challenge them to develop and test a hypothesis which determines the ideal environmental conditions for specially encapsulated sponge animals to emerge from their "cocoons". In the process, they learn the basics of how scientists design experiments, control variables, gather information, summarize and present data, and solve scientific problems. Grades 7-10
Included in this collection are rocks and minerals that break down to become the major components for soils. Samples of actual soils demonstrating texture and composition as end products are included. 15 specimens, 1" x 1/2", number-coded in a compartmented container. Soils packaged in plastic bags. Grades 5-12. Ages 10-18.
Included in this collection are rocks and minerals that break down to become the major components for soils. Samples of actual soils demonstrating texture and composition as end products are included. 15 specimens, 1" x 1/2", number-coded in a compartmented container. Soils packaged in plastic bags. Grades 5-12. Ages 10-18.
By William Berman, an introduction to and special projects for advanced study of the: Earthworm, Crayfish, Grasshopper, Clam, Squid, Starfish, Dogfish Shark, Perch, Frog, Fetal pig, and Gladiolus.
Includes: Pinworm infection of appendix, Meningitis of the brain, Arterial occlusion, Emphysema, Lung infarction, Stomach ulcer, Kidney infarction, Thyroid goiter, Liver cirrhosis; Gangrene; Carcinoma of the lung, skin, kidney, breast and liver.
(l.s.) longitudinal section
(t.s) transverse section
(w.m) whole mount
(sec) special section
Set Includes:
• H1 Human Salivary Gland (sec)
• H2 Human Squamous Epithelium
• H3 Human Stomach (sec)
• H4 Human Liver (sec)
• H5 Human Skin, Sweat Gland (sec)
• H6 Human Skin (sec)
• H7 Bone Marrow, Red (sec)
• H8 Human Bone, Ground (c.s.)
• H9 Human Muscle, Cardiac (sec)
• H10 Human Muscle, Striated (h.s.)
• H11 Human Cerebrum (sec)
• H12 Human Blood; Smear; Wright Stain
• H13 Human Tonsil (sec)
• H14 Human Lung (sec)
• H15 Human Sperm (sec)
• H16 Human Testis (sec)
Introduce the world of microscopy to your students through the selection of this prepared slide set. High-quality, yet affordable, 1” x 3” slides labeled and stored in a slotted plastic container. Set of 16 prepared slides. Human Salivary Gland (sec) Human Squamous Epithelium Human Stomach, (sec) Human Liver (sec) Human Skin, Sweat Gland (sec) Human Skin, Section Bone Marrow, Red (sec) Human Bone, Ground (c.s.) Human Muscle, Cardia (sec) Human Muscle, Striated (h.s.) Human Cerebrum (sec) Human Blood, Smear; Wright Stain Human Tonsil (sec) Human Lung (sec) Human Sperm (sec) Human Testis (sec).
Teachers guide, protect, and organize, often all at once. These armbands make their presence unmistakable, helping students and staff quickly identify leadership during both everyday activities and emergency situations.
These I.D. Armbands are designed to clearly identify staff and key personnel at a glance, helping maintain order, improve communication, and enhance safety in any environment. Whether used for daily operations or emergency situations, they ensure the right people are recognized instantly.
Crafted from durable, nylon-reinforced vinyl with a comfortable elastic fit, these armbands are built for reliability in fast-moving, high-demand settings.
From schools to large-scale events, they provide a simple, effective solution for structured coordination and peace of mind.
Key Benefits
• Immediate visual identification of staff and roles
• Durable, long-lasting construction for repeated use
• Flexible elastic fit for all-day comfort
• Ideal for emergency preparedness and daily operations
In critical moments, confusion is the enemy. These emergency armbands provide clear, immediate identification of designated personnel, helping teams respond faster and act with confidence.
Highly visible and easy to deploy, they play a vital role in emergency preparedness plans, ensuring the right people are recognized instantly when every second counts.
Crafted from durable, nylon-reinforced vinyl with a comfortable elastic fit, these armbands are built for reliability in fast-moving, high-demand settings.
From schools to large-scale events, they provide a simple, effective solution for structured coordination and peace of mind.
Key Benefits
• Immediate visual identification of staff and roles
• Durable, long-lasting construction for repeated use
• Flexible elastic fit for all-day comfort
• Ideal for emergency preparedness and daily operations
Security personnel need to be seen, and recognized without hesitation. These high-visibility armbands clearly mark authority figures, helping deter issues before they escalate and ensuring rapid response when needed.
These I.D. Armbands are designed to clearly identify staff and key personnel at a glance, helping maintain order, improve communication, and enhance safety in any environment. Whether used for daily operations or emergency situations, they ensure the right people are recognized instantly.
Crafted from durable, nylon-reinforced vinyl with a comfortable elastic fit, these armbands are built for reliability in fast-moving, high-demand settings.
From schools to large-scale events, they provide a simple, effective solution for structured coordination and peace of mind.
Key Benefits
• Immediate visual identification of staff and roles
• Durable, long-lasting construction for repeated use
• Flexible elastic fit for all-day comfort
• Ideal for emergency preparedness and daily operations
When every second matters, visibility isn’t optional, it’s essential.
These I.D. Armbands are designed to clearly identify staff and key personnel at a glance, helping maintain order, improve communication, and enhance safety in any environment. Whether used for daily operations or emergency situations, they ensure the right people are recognized instantly.
Crafted from durable, nylon-reinforced vinyl with a comfortable elastic fit, these armbands are built for reliability in fast-moving, high-demand settings.
From schools to large-scale events, they provide a simple, effective solution for structured coordination and peace of mind.
Key Benefits
• Immediate visual identification of staff and roles
• Durable, long-lasting construction for repeated use
• Flexible elastic fit for all-day comfort
• Ideal for emergency preparedness and daily operations
Monitors are the eyes on the ground, keeping spaces organized, safe, and running smoothly. These armbands make them instantly identifiable, allowing for quick coordination and effortless communication across any environment.
These I.D. Armbands are designed to clearly identify staff and key personnel at a glance, helping maintain order, improve communication, and enhance safety in any environment. Whether used for daily operations or emergency situations, they ensure the right people are recognized instantly.
Crafted from durable, nylon-reinforced vinyl with a comfortable elastic fit, these armbands are built for reliability in fast-moving, high-demand settings.
From schools to large-scale events, they provide a simple, effective solution for structured coordination and peace of mind.
Key Benefits
• Immediate visual identification of staff and roles
• Durable, long-lasting construction for repeated use
• Flexible elastic fit for all-day comfort
• Ideal for emergency preparedness and daily operations
This kit is great for all doubting Thomases in your elementary through high school classes. Fast, fascinating and easy. This kit includes: Two black-colored blocks with rim for holding melting ice cube in place. The "cooler" one is of aluminum, which is an excellent conductor of heat. The ?warmer" block is of plastic foam, which is a very poor conductor of heat.
This kit is great for all doubting Thomases in your elementary through high school classes. Fast, fascinating and easy. This kit includes: Two black-colored blocks with rim for holding melting ice cube in place. The "cooler" one is of aluminum, which is an excellent conductor of heat. The ?warmer" block is of plastic foam, which is a very poor conductor of heat.
Engineered to provide superior comfort and safety in the toughest work environments
The Icon™ premium ANSI compliant breathable and high visibility jacket – polyurethane on 300 denier polyester. Engineered to provide superior comfort and safety in the toughest work environments.
Ideal Applications: For use in environments where high visibility and breathability are desired for wearer safety and comfort.
Phase 1™ black fleece SYNC System liner included
• ANSI/ISEA 107 Type R Class 3 compliant jacket for high visibility and breathability.
• Fluorescent yellow-green background for excellent daytime visibility.
• 2 inch silver reflective tape reflects light for 360° nighttime conspicuity.
• Waterproof and breathable fabric for all season comfort.
• Breathable. Test Method ASTM E96.
• Overhead shoulder design for complete freedom of movement.
• Stitched and taped sealed seams for 100% waterproof protection.
• 2-way Zipper/storm fly front with throat guard, seals out wind and rain.
• Roll-a-way adjustable hood in collar design for added convenience.
• Full-vented cape back for improved air circulation.
• D-ring access for fall protection harness.
• Mesh/taffeta lining for added comfort.
• Hand warmer side pockets with front cargo pockets and hook & loop closure.
• Convenient front radio pocket with exterior badge holder.
• Inner breast pocket with zipper closure.
• Elastic cuffs with hook & loop take-up straps on sleeves.
• Tapered sweep with adjustable elastic draw cord on jacket for added protection.
• Dark colored front helps conceal dirt.
• 2 Mic tabs.
• Mildew resistant.
• Attachment points for use as shell in SYNC Jacket System
Engineered to provide superior comfort and safety in the toughest work environments. ANSI/ISEA 107 Class 3 compliant for high visibility and breathability. Loaded with premium features for multipurpose applications. Fluorescent yellow-green background material for excellent daytime visibility. 2" silver reflective tape reflects light for 360 degree nighttime conspicuity. For use in environments where high visibility and breathability are desired for wearer safety and comfort. All outerwear is constructed of 5.5 ounce 12 mil thick material.
FEATURES and BENEFITS.
• Waterproof, breathable fabric for all season comfort.
• Overhead shoulder design for complete freedom of movement.
• Stitched and taped sealed seams for 100% waterproof protection.
• Zipper/storm fly front with throat guard seals out wind and rain.
• Roll-a-way adjustable hood in collar design for added convenience.
• Full-vented cape back for improved air circulation.
• D-ring access for fall protection harness. Mesh/taffeta lining for added comfort.
• Hand warmer side pockets with front cargo pockets and velcro closure.
• Convenient front radio pocket. Inner breast pocket with zipper closure.
• Elastic cuffs with velcro take-up straps on sleeves.
• Tapered sweep with adjustable elastic draw cord on jacket for added protection.
Engineered to provide superior comfort and safety in the toughest work environments.
The Icon™ premium ANSI compliant breathable and high visibility jacket – polyurethane on 300 denier polyester. Engineered to provide superior comfort and safety in the toughest work environments.
Ideal Applications: For use in environments where high visibility and breathability are desired for wearer safety and comfort.
• Polyurethane on 300 denier polyester.
• ANSI/ISEA 107 Type R Class 3 compliant jacket for high visibility and breathability.
• Excellent daytime visibility.
• 2 inch silver reflective tape reflects light for 360° nighttime conspicuity.
• Waterproof and breathable fabric for all season comfort.
• Breathable. Test method ASTM E96.
• Overhead shoulder design for complete freedom of movement.
• Stitched and taped sealed seams for 100% waterproof protection.
• 2-way Zipper/storm fly front with throat guard, seals out wind and rain.
• Roll-a-way adjustable hood in collar design for added convenience.
• Full-vented cape back for improved air circulation.
• D-ring access for fall protection harness.
• Mesh/taffeta lining for added comfort.
• Hand warmer side pockets with front cargo pockets and hook & loop closure.
• Convenient front radio pocket with exterior badge holder.
• Inner breast pocket with zipper closure.
• Elastic cuffs with hook & loop take-up straps on sleeves.
• Tapered sweep with adjustable elastic drawcord on jacket for added protection.
• Dark colored front helps conceal dirt.
• 2 Mic tabs.
• Mildew resistant.
• Attachment points for use as shell in SYNC Jacket System.
The Icon LTE™ premium, lightweight, ANSI compliant, breathable, high visibility jacket – polyurethane on 75 denier ripstop polyester. Lightweight material allows for comfort and flexibility while ripstop resists tears and adds durability.
Ideal Applications: For use in environments where high visibility and lightweight breathability are desired for wearer safety and comfort.
• Polyurethane on 75 denier ripstop polyester.
• ANSI/ISEA 107 Type R Class 3 compliant jacket for high visibility and breathability.
• Loaded with premium features for multipurpose applications.
• Fluorescent yellow-green background material for excellent daytime visibility.
• 2 inch silver reflective tape reflects light for 360° nighttime conspicuity.
• Breathable. Test method ASTM E96.
• Lightweight, waterproof, breathable material is ideal for warmer climates, while interchangeable liner options provide adaptability for all season comfort.
• Overhead shoulder design for complete freedom of movement.
• Stitched and taped sealed seams for 100% waterproof protection.
• 2 way Zipper/storm fly front with throat guard, seals out wind and rain.
• Roll-a-way adjustable hood in collar design for added convenience.
• Full-vented cape back for improved air circulation.
• D-ring access for fall protection harness.
• Mesh/taffeta lining for added comfort.
• Hand warmer side pockets with front cargo pockets and hook & loop closure.
• Convenient front radio pocket with exterior badge holder.
• Inner breast pocket with zipper closure.
• Elastic cuffs with hook & loop take-up straps on sleeves.
• Tapered sweep with adjustable elastic drawcord on jacket for added protection.
• Dark colored front and cuffs help conceal dirt.
• 2 Mic tabs.
• Mildew resistant.