The corpus contains 2094 texts from the corpus Šolar 2.0 (http://hdl.handle.net/11356/1214), i.e. only those in which error annotations can be found. For each text, the information on school (elementary or secondary), subject, level (grade or year), type of text, region and date of production is provided. The original error annotations from Šolar 1.0 have been re-categorized according to a new system (the specifications in Slovene are attached). There are 36,671 error annotations in total, which also include corrections made by teachers. The corpus consists of 756,130 words from student texts (this word count does not include teacher corrections).