The first color television sets for this system were sold in 1954. They used a 15 inch screen. Later that year, 19 inch sets were made, and by 1955 all sets were made with a 21 inch picture tube.Several manufacturers made 15 and 19 inch sets, most in very small quantities.he most comprehensive website on early color history is by Ed Reitan. The first set was made by Westinghouse, and sold for $1295. RCA introduced the CT-100 a few weeks later, at a price of $1000. GE sold its 15 inch set for $1,000, Sylvania's cost $1,150.
When routines and procedures are carefully taught, modeled, and established in the classroom, children know whatâs expected of them and how to do certain things on their own. Having these predictable patterns in place allows teachers to spend more time in meaningful instruction.
Classroom Setup. Setting up your classroom strategically is the first step you can take toward helping students in your class who have ADHD. Make sure that children with ADHD are seated near your desk (unless that will distract them) and away from all windows and doors of the classroom.he most helpful ADHD classroom strategies are those that help you to teach more effectively. Begin by introducing the lesson and what students can expect to learn. Vary your methods of instruction as much as possible, and include group work, interactive activities, or visual demonstrations if possible.