Matches 1 - 17 out of 17


Match Document Document Title
8438744 Ruler and method of use  
A ruler includes a base which has a plurality of one-inch wide measurement stations which include numerical indicia. The numerical indicia can be selectively exposed or covered by an associated...
6729883 Numeric teaching device  
The present invention consists of a numeric teaching device having a plurality of spinning wheels mounted on an axle and a decimal point indicator appearing between two groups of spinning wheels,...
5769639 Multi-educational device  
A self-corrective, reversible device comprising a handled, slotted framework, on each side of which the top frame is imprinted with inverse mathematical symbols, below which is a number line from...
5738524 Multi-function teaching game box  
A multi-function teaching game box that provides a simple addition and subtraction mathematical calculation for children while playing. Moreover, the structural design of the present invention...
4856998 Teaching aids  
An improved teaching aid including a plurality of parts, each of the parts having arithmetic indicia printed thereon, the parts being operatively coupled and relatively moveable with respect to...
4772208 Apparatus for use in teaching mathematics  
An apparatus for teaching mathematics which applies and puts to work in various ways the modern teaching of mathematics for all levels of elementary education through set theory, comprises a...
4585419 Didactic aid for the teaching of any number system  
The instant invention relates to an aid for the carrying out of a didactic game in order that any (n) based number system may be learned.It consists of a series of containers decreasing in size,...
4445865 Method of teaching mathematics  
A method is provided for teaching and learning multiplication wherein unit power of ten values are assigned to strips of transparent material. The strips are positioned on a multiplication table...
4372742 Arithmetical teaching aid  
An arithmetical teaching aid includes a display board B comprising a rectangular array of display areas A arranged in rows R and columns C. Adjacent display areas A are marked (1, 10, 100 etc.) to...
4331424 Math educational apparatus  
An educational device for teaching place values in a base N number system, and regrouping between places. The device has a plurality of workpieces, a support base, partitions on the base to form a...
4176474 Visual teaching aid for number concept  
An educational device for teaching whole numbers to children; the device including a board having horizontal rows of pockets, and each pocket of the rows is identified either as "ones", "tens",...
3995378 Mathematics visual teaching aid  
A mathematics visual aid particularly useful in teaching subtraction to both slow and fast learners. The apparatus includes in a preferred embodiment form a support structure having a plurality of...
3908287 Mathematics visual teaching aid  
A mathematics visual aid particularly useful in teaching subtraction to slow learners. The apparatus includes in a preferred embodiment form a base member having a working surface which is...
3851409 MATHEMATICAL EDUCATIONAL DEVICE  
A mathematical educational device or game is provided comprising at least two playing boards each of which has a triangular cut-out the base of which is open and co-extensive with one side edge of...
3280480 Mathematical teaching aid  
3129518 Method of and apparatus for teaching mathematics  
2804699 Educational device for decimal numeration  

Matches 1 - 17 out of 17