This fact sheet answers the most frequently asked health questions (FAQs) about perchlorates. For more information, call the ATSDR Information Center at 1-800-232-4636. This fact sheet is one in a series of summaries about hazardous substances and their health effects.erchlorates are colorless salts that have no odor. There are five perchlorate salts that are manufactured in large amounts: magnesium perchlorate, potassium perchlorate, ammonium perchlorate, sodium perchlorate, and lithium perchlorate. Perchlorate salts are solids that dissolve easily in water.
Instructions. 1  1. First of all, start with few and easy sign languages. Introducing too many signs at one time will be a useless effort. 2  2. Introduce the signs to your children in such a way as âyou say the word.â It helps in associating the word with the sign language.
Montessori International, January â March 2005 39 The Braille alphabet. Adapting the classroom for visually impaired children Pat Jenkins explains how tohelp visually impairedchildren reach their fullpotential.O ver the years, more and morechildren with special needs arejoining our schools andnurseries.ou might only need to usesome of the ideas. Always observe andfollow the individual child. Setting up the classroom 1) CLOAKROOM: â¢ Partially sighted children: enlarge the nametag, and place at childâs eye level.â¢ Totally blind children: the name tag shouldbe in Braille, and with a raised symbol(shape button).