Kindergarten
Click on the link below for more details about the math practices.
http://www.cesa2.org/STEM/Standards%20for%20mathematical%20practices%20at%20the%20elementary%20level%20by%20grade.pdf
http://www.cesa2.org/STEM/Standards%20for%20mathematical%20practices%20at%20the%20elementary%20level%20by%20grade.pdf