Although some condom manufacturers still use talc as a dry lubricant, others use dry lubricants such as silicone and cornstarch. The harmful effects of talc on human tissue were first recorded in the 1930s. Thirty years later there was a reported case of a woman who had a significant amount of talc in her peritoneal (abdominal) cavity talc which matched that found on the surface of her husband's condoms (Lancet, 1963; 1: 1295-6).
Marcia Taylor, JobLink 2000. The language experience approach (LEA) is a whole language approach that promotes reading and writing through the use of personal experiences and oral language. It can be used in tutorial or classroom settings with homogeneous or heterogeneous groups of learners. Beginning literacy learners relate their experiences to a teacher or aide, who transcribes them. These transcriptions are then used as the basis for other reading and writing activities.
The theory of the learning curve or experience curve is based on the simple idea that the time required to perform a task decreases as a worker gains experience. The basic concept is that the time, or cost, of performing a task (e.g., producing a unit of output) decreases at a constant rate as cumulative output doubles.