Students will learn how to recognize arithmetic and geometric sequences. At this time, we use a phrase such as "number patterns" instead of "arithmetic" or "geometric sequence."

Watch these Khan Academy videos:

Next, give your students this challenge:

The Add and Take-away Path by NRICH

Conclude by leading this investigation:

Graphene Trampoline (logic & probability)

by MathPickle

3.OA.D.9: Identify arithmetic patterns (including patterns in the addition table or multiplication table), and explain them using properties of operations. *For example, observe that 4 times a number is always even, and explain why 4 times a number can be decomposed into two equal addends.*