Christina Tondevold has a great collection of resources with very explicit material around early numeracy https://www.therecoveringtraditionalist.com/
This video by Christina Tondevold gives a summary of early numeracy concept development. "Number sense isn't 'taught', it's 'caught' ".
Principles of Counting and Quantity: Information on stable order, one-to-one correspondence ,cardinality, conservation, order irrelevance, abstraction, subitizing, hierarchical inclusion and unitizing. Principles of Counting Quantity Cheat Sheet v2
Printable Hundreds charts puzzles, one more one less, skip counting
Maze Hundreds chart--plays in power point. Can be used on SMARTboard
Steve Wyborney most popular downloads
Graham Fletcher videos 
Making Sense of Early Number and Counting
Progression of Addition and Subtraction
Place Value concept development
Pam Harris: Math is Figure-Outable https://www.mathisfigureoutable.com/