This document summarizes a study that analyzed grammatical errors in writing by ninth grade students learning English as a second language in Pakistan. The study asked students to write about difficulties learning English and analyzed 176 total errors. The most common errors were in use of prepositions (50 errors), articles (52 errors), and morphology (32 errors). Other error types included tense (26 errors) and active/passive voice (16 errors). The results suggest error analysis can provide insight into students' language development and help teachers address areas of difficulty. The study supports using contrastive analysis to understand how a first language influences second language learning.