Number lines, 100 boards and other tools
The number line is underutilized as a mathematical model that could be instrumental in fostering number sense and operational proficiency among students. There has been a growing body of research to suggest the importance of the number line as a tool for helping children develop greater flexibility in mental arithmetic as they actively construct mathematical meaning, number sense, and understandings of number relationships.
Here are large Tally Marks that can be used during demonstration, games and instruction. Pinterest has a ton of ideas to share with educators.
Number of the day
Number of the Day (0-99) and a generic number sheet can be used to help students consider number relationships.