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.
1 Look at the first addition problem: 1 + 1 2  =. have the child place the blue 1 strip at the top of the board and the red 1 strip directly next to it. 3  Show and say with the child: 1 + 1 = 2. 4  Have the child fill in 2 for the answer on the paper.5  Have the child replace the material and continue for the whole table of 1. Have the child bring Chart 1, the two sets of strips, and the board to the table. 2  Introduce the child to the board. 3  Show the child the red line which shows us that we have reached ten. 4  Show the numbers at the top of the board and tell the child that this is where the answer will be found.