Here's a fun way for horse crazy kids to explore pattern rules. According to the Chinese Zodiac, every 12 years is the Year of the Horse. The World Equestrian Games are held every 4 years, with the first one ever held in 1990. Not only do kids write the pattern rule for each of these events—they then explore how the two patterns relate to each other! Every third World Equestrian Games takes place in the Year of the Horse!
4.OA.B Gain familiarity with factors and multiples.
4.OA.C Generate and analyze patterns.
5.OA.B Analyze patterns and relationships.