Your Algebra 1 Keystone exam in January will have two tests (Module 1 and Module 2). Each of those tests will contain 4 constructed response questions. Out of those 4, 3 of them will count and 1 of them is called a "field test question", meaning it doesn't count towards your score.
Each constructed response is worth a total of 4 points. Module 1 has 12 constructed response points availble. Module 2 has 12 constructed response points available. This totals 24 constructed response points on the Keystone exam. Most people that get at least 10 out of 24 score "proficient".
PRACTICE, PRACTICE, PRACTICE ! :)