This resource is a binary number review worksheet. The binary numbers are represented by lit and unlit candles on a Chanukiah (often referred to as a menorah for the Jewish holiday of Chanukah). I work at a Jewish day school and was looking for some binary review worksheets for my third grade class who was studying computer science concepts. The only worksheets I found were Christmas related, so I came up with this one for Chanukah.
Instead of 1’s and 0’s the worksheet uses lit and unlit candles to represent the binary numbers. Chanukiahs have eight candles, plus the Shamash. The Shamash is the candle used to light all the others and is usually the highest candle, in this case I put the Shamash on the far left. The eight candles represent eight binary bits, which together make up one byte of information.
IMPORTANT: Students need to IGNORE the Shamash in order to convert the binary numbers correctly. The perfectionist in me had to have the Shamash lit, how else would any of the other candles be lit? Students just add the eight day candles, all on the same level, reading them right to left.
Students should have some grasp of counting in binary in order to complete the worksheet. This worksheet will provide a check for understanding, enrichment exercise, or short homework / classwork. There are eight numbers for the students to convert from binary to decimal and three that they have to convert from decimal into binary (by drawing lit candles.). Fourth graders were able to finish this worksheet in about ten to fifteen minutes.
Note: Even though this worksheet represents the Jewish Holiday of Chanukah, it is appropriate for all audiences studying binary numbers. The eight days of Chanukah provided a perfect use of eight bits of information making up one byte.