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Investigations was developed between 1990 and 1998. It was just one of a number of reform mathematics curricula initially funded by a National Science Foundation grant. The goals of the project raised opposition to the curriculum from critics (both parents and mathematics teachers) who objected to the emphasis on conceptual learning instead of instruction in more recognized specific methods ...
A dilution effect is seen when animals living in a group "dilute" their risk of attack, each individual being just one of many in the group. George C. Williams and W.D. Hamilton proposed that group living evolved because it provides benefits to the individual rather than to the group as a whole, which becomes more conspicuous as it becomes larger.
Collective animal behaviour is a form of social behavior involving the coordinated behavior of large groups of similar animals as well as emergent properties of these groups. This can include the costs and benefits of group membership, the transfer of information, decision-making process, locomotion and synchronization of the group.
The curriculum is project-based. Three levels of curriculum are used for elementary, middle, and high-school levels. PLTW Launch is the elementary school level, designed for preschool through fifth grade. The curriculum consists of 28 modules (four per grade) that touch on a variety of science and technology topics.
For example, in a medical study patients are recruited as a sample from a population, and their characteristics such as blood pressure may be viewed as arising from a random sample. Under certain assumptions (typically, normal distribution assumptions) there is a known ratio between the true slope, and the expected estimated slope.
However, the dilution of colour is not visible in the phenotype - the dog has the same coat colour as a DD dog. dd: Sire and dam have inherited the allele for the dilute colour expression. The black areas of the coat are lightened to blue, dogs additionally lightened by the gene on the B locus take on the colour typical of the Weimaraner.
[3] [28] The molecular cause behind the dun coat colors is not entirely understood, but the dilution effect comes from the placement of pigment in only part of the hair. The associated coat colors were assigned to the Dun locus in 1974 by Stefan Adalsteinsson, separate from Cream, with the presence of dun dilution indicated by the dominant D ...
The Principles and Standards for School Mathematics was developed by the NCTM. The NCTM's stated intent was to improve mathematics education. The contents were based on surveys of existing curriculum materials, curricula and policies from many countries, educational research publications, and government agencies such as the U.S. National Science Foundation. [3]
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