Since most underwater treasure involves ship wrecks, there are often small objects scattered around the main treasure. When the sonar hits these objects you know you are getting close to the really big item. Build a playing grid on the overhead by making a transparency of gridport.doc . For the first game, students will be the treasure hunter and the teacher will be the recorder. Have another game board prepared for your use after you've demonstrated how to hide the treasure.
Students record their search results on spreadsheet grid paper.
Explain that columns are labeled with letters and rows with numbers. Spreadsheets use letters, called alpha, to label columns. Rows are labeled with numbers. Cell references are read column first, then row. Determine shapes of treasure Treasure is classified by the number of marks used to represent the item.