Fe, phi, fo, fum. This activity leads pairs to find the ratio of consecutive terms of the Fibonacci sequence. The pairs find that the Fibonacci sequence can be found in many places. A discussion with the class shows that the ratios...

How do computers sort data lists? Using eight unknown weights and a balance scale, groups determine the order of the weights from lightest to heaviest. A second activity provides the groups with other methods to order the weights. The...

Elementary schoolers solve six problems, multiplying by multiples of 10. They line up the numbers as shown and then check their answers online.