| 摘要 |
A teaching or testing aid comprises an elongated, square, central bar which is centrally supported at each end by square supports. The bar has equally spaced indentations along each of its four surfaces where cubes can be freely attached or detached, either separately or in multiples by the teacher and/or student. The appropriate placing of plain or coloured cubes enables the demonstration and/or teaching, then testing of the student's cognitive abilities to recognise and understand a broad range of the principles of spatial concepts such as under, over, next to, top and bottom. The appropriate placing of plain or coloured cubes also allows the introduction of colour, number and mathematics, within the aids recommended three positions while in use, on a flat surface such as a table or desk in front of the teacher or student. , The three positions are: position 1: lying horizontally lengthwise with the notional x and y axes displaying as the left and right of the aid's ends (figure 3) enabling the demonstration of spatial concepts such as left, right and centre. position 2: , when in use the notional x and y axes shift in relation to the changed position when the aid is placed vertically with one end support on the flat surface to now display the aid (figure 4) enabling the demonstration of spatial concepts such as top and bottom; position 3: when in use the aid's notional x and y axes shift in relation to the changed position when the aid is lying with one end support towards the teacher/student to now display (figure 5) enabling demonstration of spatial concepts such as nearest and furthest; The complete aid can also be rotated lengthwise on the surface in front of the teacher/student thereby shifting from the initial position of the notional x and y axes while in any of the aforementioned positions or rolled one or more quarter turns on the edges of its end supports either away from, or towards the teacher/student. Rolling also is possible in combination with rotating; in the aid's position 2 twisting on the end support will produce the equivalent of rolling the aid in the other positions.
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