20 MATH STORIES y en español 
10. Math Trains (gr. 1 and up): Piggy loves trains, so when Wolf invites her to see a train in the woods she follows. Piggy discovers growing patterns and their bar graphs. [growing patterns; algebra; constants, variables; bar graphs]  
NUMBER PATTERN/ALGEBRA MEASUREMENT/GEOMETRY DATA/PROBABILITY


Growing patterns that change & stay the same Piggy discovers growing patterns. When she plots them as bar graphs, some are steeper than others, and she wonders why. Content: growing patterns; parts that change or stay the same; multiple representations 41 pages 

