I am working with a data set to model student performance with various variables from the class/school/district/provincial level. Student performance is extremely low though--~70% of reading performance scores are 0.

I have no experience working with non-parametric models, but assume I should use one for this non-normal distribution. I am playing around with a logit model and using a above/below threshold for student performance.

What other models should I explore with this kind of data?

Here is the score distribution:

Score-Number

0-630

1-	2

2-	1

3-	1

5-	1

8-	1

9-	2

10-	2

11-	4

13-	2

14-	1

18-	10

19-	1

20-	2

21-	1

22-	3

23-	2

28-	3

29-	2