Magnetic Storage. Piano wire, an electromagnet and a microphone. This was all the Danish inventor Valdemar Poulsen (1869-1942) needed in 1898 to create the telegraphone or wire recorder â the first known device capable of recording sound magnetically.agnetic Storage. Piano wire, an electromagnet and a microphone. This was all the Danish inventor Valdemar Poulsen (1869-1942) needed in 1898 to create the telegraphone or wire recorder â the first known device capable of recording sound magnetically.
And as of 2016, there are about 2.3 million home-schooled students in the United States (Brian, 2016). The studies found that of these children, 83 percent were White, 5 percent were Black, 7 percent were Hispanic, and 2 percent were Asian or Pacific Islander.
Taxpayers spend nothing on most homeschool students and homeschool families spend an average of $600 per student for their education. Homeschooling is quickly growing in popularity among minorities. About 15% of homeschool families are non-white/nonHispanic (i.e., not white/Anglo). An estimated 3.4 million U.S. adults have been homeschooled for at least one year of their K-12 years, and they were homeschooled an average of 6 to 8 years.