What is explosion testing?

What is explosion testing? A combustible gas or vapor forms an explosive gas (vapor)/air mixture with a certain mixing ratio, and the mixture explodes in the presence of a certain ignition source. Explosion can be prevented by eliminating one of three combustion elements, namely fuel, air (oxygen), and ignition source. Read more…

What is a phonics lesson?

What is a phonics lesson? Phonics instruction teaches common letter-sound relationships, including sounds for common letter patterns, so that readers can apply them in decoding unfamiliar words. What order should I teach phonics skills? As we stated on our Keys to Success page, phonics instruction must be systematic and sequential. Read more…