The CZmaturaS dataset comes from a matura exam in
  mathematics. The exam was assigned in 2019 to students in Grade 13, at the end of
  their secondary education. This is a random sample of 2,000 students from a
  total of 15,702. Original data available from
  https://cermat.cz/.
data(CZmaturaS)CZmatura is a data.frame consisting of 2,000
  observations on 75 variables.
School type code.
First attempt; "1" yes, "0" no.
School type gymnasium; "1" yes, "0" no.
Item answers.
Scored item answers.
Total score, calculated as sum of item scores (0 - 50).
Score estimated from GPCM/2PL model.
SE of score estimated from GPCM/2PL model.