The OASD Curriculum for Mathematics is aligned to the PA Core Standards.  The PA Core Standards for Mathematics can be found here.  

OASD Math Curriculum 

Resources

GETTING TO THE CORE: HOW DO I HELP MY CHILD IN MATH?
Instructional Shifts in Mathematics
PARENT ROAD MAPS TO THE COMMON CORE: MATHEMATICS
PARENT ROAD MAPS TO THE COMMON CORE: MATHEMATICS (SPANISH VERSION)
Progressions of Learning for Addition and Subtraction
Common Multiplication and Division Situations