This is a great resource to challenge your 4th or 5th grade math class with identifying and explaining patterns and relationships.
Generate and analyze patterns
CCSS.Math.Content.4.OA.C.5
Analyze patterns and relationships.
CCSS.Math.Content.5.OA.B.3
Generate two numerical patterns using two given rules. Identify apparent relationships between corresponding terms. Form ordered pairs consisting of corresponding terms from the two patterns, and graph the ordered pairs on a coordinate plane. Expla