Scientific Methods As Applied To Child Education In "the Children's Houses"

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are arranged in order of length, which is also in order of numeration.
The first exercise consists in trying to put the shorter pieces together in such a way as to form tens. The most simple way of doing this is to take successively the short­est rods, from one up, and place them at the end of the corresponding long rods from nine down. This may be accompanied by the commands, " Take one and add it to nine; take two and add it to eight; take three and add it to seven; take four and add it to six." In this way we make four rods equal to ten. There remains the five, but, turning this upon its head (in the long sense), it passes from one end of the ten to the other, and thus makes clear the fact that two times five makes ten.
These exercises are repeated and little by little the child is taught the more technical language; nine plus one equals ten, eight plus two equals ten, seven plus three equals ten, six plus four equals ten, and for the fve, which remains, two times five equals ten. At last, if he can write, we teach the signs plus and equals and times. Then this is what we see in the neat note-books of our little ones:
When all this is well learned and has been put upon the paper with great pleasure by the children, we call their attention to the work which is done when the pieces grouped together to form tens are taken apart, and put back in their original positions. From the ten last formed we take away four and six remains; from the next we take away three and seven remains; from the next, two and eight remains; from the last, we take away one and nine
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