The time for one complete cycle, a left swing and a right swing, is called the period. The period depends on the length of the pendulum, and also to a slight degree on the amplitude, the width of the pendulum's swing.he period of swing of a simple gravity pendulum depends on its length, the local strength of gravity, and to a small extent on the maximum angle that the pendulum swings away from vertical, Î¸0, called the amplitude.
Compulsory elementary schooling was formally introduced in Sweden in 1842. A process of reform, destined to take many years, began in the 1940's with the aim of expanding compulsory schooling.
In 2011, the country started to transition from its old 10-year basic educational system to a Kâ12 educational system, as mandated by the Department of Education. The new 12-year system is now compulsory, along with the adoption of new curriculum for all schools (see 2010s and the Kâ12 program).owever, after Philippine independence, its educational system changed radically. From 1945 until 2011, the basic education system was composed of six years of elementary education starting at the age of 6, and four years of high school education starting at the age of 12.