新增STEAM活动
Energy Tube
SKU #OHM-350
下载免费能源管课程创意 PDF
Description: Safely demonstrate open and closed series circuits without any danger of electric shocks! 当电子管“打开”时, the red, green, 蓝色的灯光亮了起来，发出一种怪异的颤动的声音. Activating the tube is the fun part – just touch the metal ends with both hands. Your body forms the conducting material that bridges the gap between the two metal strips and closes the circuit! 7″ x 1.5″.
微型真空装置
Item #: VAC-10
下载免费的微型真空教学理念 PDF
Description: Students can now safely produce a vacuum in a small bell jar right at their lab stations. 通过降低微型钟罩内的压力, 它们可以使气球膨胀, boil water, 甚至可以将液体从一个移液管转移到另一个移液管. They can watch a marshmallow or shaving cream increase in volume as the pressure is reduced and learn about how extremely low pressure affects the world around them. 而不是被动地观察演示, students can actively experiment on their own and observe the results right before their eyes.
More advanced high school and college level students can study Boyle’s and Raoult’s Laws and finally understand the relationship between vapor pressure, temperature, and boiling point. Included with the full instructions and guide is a bonus set of Educational Innovations ideas to challenge you and your students.
Kit includes 8.5 cm (3.5″) bell jar, base plate, 真空泵注射器, suction cup, balloons, pipets, instructions, 以及Ron Perkins的《推荐全球十大博彩公司排行榜》.
Plasma Globe
SKU#: PLS-105
下载免费的等离子地球仪课程理念 PDF
Description:一个有趣和安全的方式来演示特斯拉线圈! Inside the globe, a small Tesla Coil produces an alternating high voltage potential which attracts or repels free electrons. When the electrons collide with the gaseous atoms and molecules inside the globe, 气体粒子被电离，产生更多的电子, 还有正离子. A plasma is formed. 当电子返回到电离气体时，就产生了光. Touching the globe with your finger provides a ground, an additional source or “sink” of electrons. 你也可以观察Super! Wow! Neat!® effects by moving a fluorescent tube or neon light near the plasma globe. 它们会在你手中发光! 运行在标准的北美线路电流，110伏60赫兹. 8 in. dia. globe.
Chemical Heat Pack
Item #: HEA-400
Description:点击金属盘，观察液体结晶. 年纪较小的学生可以安全地感受到身体变化的热度. Advanced students can determine the heat of fusion of hydrated sodium acetate (fp = 54 oC). 非常适合量热实验! Bending the metal disk initiates the crystallization of super-cooled sodium acetate and water; boiling in water returns the solid to a liquid. 可以反复使用吗. 提供指导和教学思路! 10 × 10厘米(4″× 4″)
Discussion: The Heat Solution™ commercial hand warmers contain a hydrated solid called sodium acetate trihydrate, NaCH3COO•3H2O. 当这个塑料包装放入沸水中, 里面的固体溶解在自己的水合作用中. 溶液冷却后, 过量的固体醋酸钠仍然溶解, 形成过饱和溶液. Bending the small metal disk inside the package causes enough of a disturbance to initiate the crystallization of the excess solid. Heat is released as the supersaturated solution separates into solute and solvent again.
Objective: To determine the molar heat of crystallization of sodium acetate by using a commercial heat pack, water, 咖啡杯式热量计, 还有一个温度探头.
Directions: In lab teams, design an experimental approach to answer the research “question” posed in the objective above. Develop a complete materials list, a detailed procedure, and appropriate data tables. Your instructor will approve these when the following criteria are met: safety, simplicity, 以及材料的可用性. 执行程序, analyze the data, 评估该方法的有效性, and redesign, 必要时改进方法.
NOTE: The average mass of the empty plastic bag and the metal disk used in the Heat Solution
袋已测量，是5.42 grams. 反应热的文献值是-19.7 kJ/mol. 计算误差百分比.
Questions
1) You assumed the measured mass of the handwarmer was pure supersaturated sodium acetate. 这个假设成立吗?? 解释为什么或为什么不.
2)用问题1的答案, should your experimental heat of reaction be larger or smaller than the literature value? Justify your answer.
3) A handwarmer had a few crystals of sodium acetate trihydrate present before the handwarmer was agitated, 这将如何改变计算出的反应热? Explain your answer.
4) How would the experimental result change if a student kept their temperature probe in constant contact with the plastic cover of the handwarmer when they were measuring the temperature. Explain your answer.
Putt-Putt Boat
Item #: HEA-400
下载免费的推杆-推杆蒸汽船课程的想法 PDF
Description在20世纪20年代最初被称为“Putt Putt蒸汽船”, 这些复制玩具可以用来教授许多科学原理. 用蜡烛的小火焰或几滴食用油, 这艘10厘米(4″)长的船将行驶数小时. It is great for demonstrating the transformation of heat energy to mechanical energy. 更高级的学生可以被要求解释它是如何工作的. 在一个圆形的水锅里观看真是太迷人了. Colors may vary.
Insta-Snow Polymer
Item #: GB-315
下载免费的Insta-Snow Lesson Ideas PDF
Description: Add water to this granular white powder and watch it instantly expand to 40 times its original volume. 结果就是松软的人造雪，摸起来和看起来一样凉爽! 我们的雪不会“融化”，但它可以脱水并重复使用. Great for teaching endothermic and exothermic reactions or as part of a polymer lab. This is a great demonstration of interest to students and educators of ALL ages and abilities. 点击我们的博客链接，学习简单易懂的聚合物实验课程.
乐高简易机器套件
Model #9686
下载免费的简单机器课程计划
免费下载简单机器的建造说明
Description:此套件适合8岁以上的学生使用, and comes with detailed building instructions for students working in pairs. The lesson ideas available from LEGO Education helps students to explore the scientific principles behind the mechanical advantages that can be gained by using simple machines in their daily lives.
皮茨科大桥建筑套件-椴木.
SKU: W46135
Description: Building model bridges from basswood is a great way to get students engaged in technology, science, 工程原理. 这个入门包包括供25名学生使用的材料, testing equipment, 和课程，让你的课堂进入桥梁建设. Access to the free Pitsco Bridge Book 桥梁建造说明, 桥梁的简史, construction ideas, 还有更多的电子版可供下载 here. 寻找基于标准的活动来配合这些材料? The 模型桥梁教师指南 可供印刷 here，或者你也可以免费下载电子版 here. The Vernier Materials & Structures Tester can be used to quantify the strength of various bridge designs and identify areas of weakness.
汽水瓶火箭
SKU: W46135
下载免费的火箭科学课程
Description: Building and launching soda bottle rockets can provide students with an outlet for their creative side as they design and decorate their rocket. It can also lead to a better understanding of the forces acting on a projectile, 并可能有助于演示牛顿运动定律的应用. 制造瓶形火箭的材料很容易获得, and may be one of the best investments in getting students exciting about science. 发布日的活动也很有趣! Note: These rockets must be launched outdoors in a large open area and require ready access to gallons of water.
Estes Model Rockets
Kit: #009427
下载模型火箭安全守则 PDF
下载免费单元和课程计划
Description: The Rocketry Challenge Starter set is designed to bring you into the adventure of competition rocketry. The first step to succeeding in these competitions is learning how to build, 完成并发射一个模型火箭! The Rocketry Challenge Starter Set comes complete with 12 Estes Alpha rockets, 12 B6-4 engines, 2全寿命发射系统, 还有一堆贴纸，让每个火箭都独一无二. Note: These rockets must be launched outdoors in a large open area on a non-windy day. 他们可以到达1000英尺的高度!
K 'Nex过山车
Kit: #77078
下载免费的建筑说明和实验 PDF
Description:在建造电动过山车的同时探索STEM概念! 了解时间之间的关系, 距离和速度与这个引人入胜的过山车建筑集. 学生们在学习科学知识的同时也会玩得很开心, technology, engineering and math concepts associated with a real-life amusement park ride! 建造一个可以工作的过山车，再加上两个额外的模型. 包括三个实验，每个模型一个. Set includes more than 545 parts, a battery-powered motor and three experiments.
