Information From The Pennsylvania Department Of Education:

Algebra 1 Anchors and Eligible Content 

Information For HH Students:

Review problems for Algebra 1 Modules.  Includes sample multiple choice and constructed-response problems:

Algebra 1 Anchors and Eligible Content with Sample Problems 

When?  The Algebra 1 Keystone Exam will be given  in the winter (Dec-Jan) and again in the spring (May).  Math teachers and guidance counselors will make students aware of their obligations.