In math bingo, each student is given a bingo card (also known as a "bingo worksheet" or "bingo board") printed with numbers. These aren't necessarily the standard bingo numbers, but rather are the answers to a number of different math problems.
Learning math usually of course begins at young age, sometimes even at home, with learning numbers and counting. At kindergarten and then school, students then progress through arithmetic (addition, subtraction, multiplication, and division), and eventually to more advanced topics such as algebra, geometry, graphs and charts, and statistics.
An Excel worksheet is electronic ledger created by the spreadsheet application Microsoft Excel. Worksheets are used to allow their users to store edit and manipulate data within rows and columns divided into cells.
The game is then played exactly like a normal game of bingo, with the teacher playing the part of the bingo caller, but instead of the teacher calling out the numbers printed on the cards, the teacher instead calls out math problems (the teacher may also write the problem on the blackboard). The students' task is to solve each problem, and then look for the number on their bingo card.