How to Make a Slingshot. Imagine the idealized rough and tumble boy depicted in literature, movies, and TV shows. Go ahead. Do it. Done? Whether you imagined Tom Sawyer, Dennis the Menace, or Bart Simpson, chances are you pictured him with a handmade slingshot dangling from his back pants pocket. The humble slingshot has been a fixture among boys across cultures and across generations. The first modern-type slingshots probably didn’t make an appearance until vulcanized rubber was invented in 1839. 19th century boys used old rubber tire inner tubes as the bands to catapult their rocks and pellets at cans and unsuspecting cats.
The slingshot was the first product WHAM-O made, and it gave the company its memorable name. The popularity of the slingshot really took off though after WWII and commercially-made slingshots became widely available. Materials & Tools Needed Materials A Y-shaped tree branch with at least a 30 degree fork1/4″ latex surgical tubing (available at Home Depot)Leather stripsDental floss Tools. Weekend DIY Dad Activity: How to Make a Quick-n-Easy Water Rocket. Email subscribers, to watch video click here. Editor’s note: This is a guest post from David Erik Nelson, author of Snip, Burn, Solder, Shred: Seriously Geeky Stuff to Make with Your Kids. Although store-bought water rockets were once an almost universal part of childhood (at least in suburban middle America, where I grew up), DIY water rockets are almost unheard of in the United States, despite being common in the United Kingdom.
The key to the DIY water rocket is the ubiquitous plastic soda bottle. (Often called PET bottles in the UK, these are basically made of polyester, just like your favorite pantsuit.) A soda bottle can easily withstand 150 pounds of pressure per square inch—significantly more than a car or bike tire, and more than enough to launch it into flight. The following design dispenses with many of the concerns regarding valves, firing mechanisms, pressurization, and so on, because the unit is impossible to over-pressurize, thus eliminating the risk of a rocket explosion. Ten Children’s Songs You Can Play By Learning Just Two Guitar Chords. Bloom's Taxonomy. Bloom's wheel, according to the Bloom's verbs and matching assessment types. The verbs are intended to be feasible and measurable. Bloom's taxonomy is a classification of learning objectives within education. It is named for Benjamin Bloom, who chaired the committee of educators that devised the taxonomy, and who also edited the first volume of the standard text, Taxonomy of Educational Objectives: The Classification of Educational Goals.
Bloom's taxonomy refers to a classification of the different objectives that educators set for students (learning objectives). It divides educational objectives into three "domains": cognitive, affective, and psychomotor (sometimes loosely described as "knowing/head", "feeling/heart" and "doing/hands" respectively). Within the domains, learning at the higher levels is dependent on having attained prerequisite knowledge and skills at lower levels. Bloom's taxonomy is considered to be a foundational and essential element within the education community.