More than half of LPS teachers add to their salaries with extra duties such as teaching summer school, sponsoring after-school clubs, coaching or putting on plays. While nearly 12 percent of teachers make $10,000 or more in extra pay, the rest make much less.
The first demonstrations of television in the US were in 1928 by Philo Farnsworth. It was more than a decade before televisions were made and sold commercially. In 1939, RCA b â¦ egan producing a commercially viable product and this represented the first widely available television.
PRISM (TV network) - History. 1  PRISM launched at 5:30 p.m. Eastern Time on September 1, 1976; it debuted with a message by announcer Hugh Gannon: Good evening, everyone. PRISM, the pay-television network, is on the air.. Following this was the first movie to be broadcast on PRISM, the 1975 film The Wind and the Lion.