We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.
Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.
presented. One way of designing it is to space out a number of problems down the left half of the board and then form a second column of answers down the right half of the board similar to a paper-and-pencil matching question.
STEP ONE: Picture 1 shows the materials used to make one type of inexpensive electric board. In addition to the poster board, necessary materials include: a small direct current buzzer (approximately $1.25); a sixvolt dry-cell battery ($.90); 20 feet of one strand, light, insulated wire (ob
tained at any hardware or television supply store for 1 to 2 cents/foot); and 18 large-size paper brads (about $.25 per box).
STEP TWO: .As shown in Picture 2, multiplication problems were placed in a column down the left side of the board and the answers to these problems were placed in the right hand column. Holes were drilled in the poster board opposite each problem and answer, and a copper brad was inserted in each hole. STEP THREE: Picture 3, showing the reverse side of the poster board, illus
trates the simple wiring of the board. .After removing about two inches of insulation from each end of a length of wire, one end is wound around the extended prongs of a brad next to a problem and the opposite end is connected to the brad adjacent to the correct answer. The prongs are then spread apart, insuring a tight connection.
STEP FOUR: By carefully looking at' Picture 4, one can see that the buzzer and battery are connected in series. This was done by connecting a short wire from one terminal of the battery
(1) Materials used to make one type of board
(2) Inserting brads in holes beside each item
(3) Connecting problem and correct answer brads (4) Wiring the battery and buzzer in series
Educational Screen