This resource includes my 16 go-to files for number agency. They include posters to help the agents develop stage 1 - 3 problem solving strategies. The posters include using ten, using doubles, counting in groups, counting on, counting back etc.
I keep these files in a confidential box which acts as a great prop for agency, we add a new file to the box as we come across that strategy. These posters are a great form of formative assessments.
Clipart in this resource from: