The Sixties decade featured a number of diverse trends. It was a decade that broke many fashion traditions, mirroring social movements during the time. Women's hair styles ranged from 'beehive' hairdos in the early part of the decade to the very short styles popularized by Twiggy and Mia Farrow just five years later to a very long straight style as popularized by the hippies in the late 1960s. Between these extremes, the 'chin-length contour' cut and the 'pageboy' were also popular. Hair styles were very big and used a large quantity of hair spray, somewhat like ours today.
Throughout much of the Seventies decade, women and teenage girls wore their hair long, with a centre or side parting, which was a style carried over from the late 1960s. Other hairstyles of the early to mid-1970s included the wavy "gypsy" cut, the layered shag, and the "flicked" style, popularly referred to as "wings", in which the hair was flicked into resembling small wings at the temples. This look was popularized by the stars of the television series Charlie's Angels. Blonde-streaked or "frosted" hair was also popular.
In the 1970s, making one of the popular hairstyles for a woman didn't take a lot of time. These hairstyles, including Afro hairstyle, Shaggy Hairdo and Feathered hair (then known as "Farrah Fawcett hairstyle") were said to be perfect when you're on-the-go and would still keep your expressive style in-check. These are what female students at high schools in California from the late 1960s to early 1970s looked like.
(Photos from ozfan22)