Which statistical analysis to use?

We have the assignment of trying to determine if a piloted curriculum has impacted student achievement scores on their state test for the past 3 years. Now of course the students' scores vary (the scores in Levels 1-4, with 4 being the best):yup::yup:. The dependent variable is the student's score and the independent is the curriculum. How would you go about analyzing this?

This is all the information that was given. Thanks!
Only 2 variables? "Curriculum" is a categorical variable?
If so, crosstabs and related tests and correlations is what you need (ANALYZE>DESCRIPTIVES>CROSSTABS).