Presentation for long rods Courtesy: CERDS [Center for Educational Research and Developmental Studies ]
LONG RODS or RED RODS <ul><li>Ten, red wooden rods. The height and width are constant. The lengths increase by ten centimeters from the shortest rod, which is one decimeter, to the longest which is one meter. Ten of the shortest rods would equal the length of the longest rod. The difference in length between any two consecutive rods is the same as the length of the shortest rod which is ten centimeters or one decimeter. </li></ul>
PURPOSE <ul><li>Visual Discrimination It’s the study of size. This time, size varies only along one dimension. The child judges by sight and touch. This enhances awareness of length in the environment. </li></ul>Child in the picture is feeling the length of the rods, from longest to the shortest.
Pre-requisite <ul><li>The long rods are more difficult than the pink tower or broad stair, and should only be offered after the pink tower and broad stair are being built easily by a child. </li></ul>Child’s age is 2 and 1/2 to 5 years
Presentation <ul><li>The teacher spreads a mat on the floor and lets the child help carry the rods to the mat. The teacher lays the rods at random on the mat but parallel to each other. </li></ul>
Presentation… <ul><li>a) The teacher sits next to the child and shows him how to judge the lengths by sight (visual Perception) and touch (tactile sense) by taking the first two fingers of the dominant hand, and feeling the entire length of the larger ones in turn from one end to the other. </li></ul><ul><li>b) Then, the teacher selects the longest by sight and touch and places it nearly at the top of the mat. The teacher then selects the next longest rod by touch and sight and places it touching the longest, making sure the left ends are even. </li></ul><ul><li>c) The teacher continues to select rods in order of length, arranging them with even ends on the left. </li></ul>
Variation <ul><li>The child has been given a different lesson which changes the purpose of the long rods and shows him how to form a maze from it and the child enjoys it very much. </li></ul><ul><li>He walks through it and avoid touching the red rods. He carefully watches the feet and walks slowly. </li></ul><ul><li>It’s a good exercise for the young people to get the control with movements of their body. </li></ul>
VOCABULARY <ul><li>The child listens to the following words at the time of presentation, which are registered in his sub-conscious to form strong vocabulary bank. </li></ul><ul><li>Long - Short </li></ul><ul><li>Long - Longer - Longest </li></ul><ul><li>Short - Shorter - Shortest </li></ul>