This assignment requires a detailed analysis of a language error made by an ELL student. The student's sentence 'Put in one side of the equation the number and in the other one the variables' is examined for semantic meaning, with the conclusion that it is ambiguous and offers incomplete information. The error is then attributed to L2 development due to McLaughlin's Attention-Processing Model, which suggests that learners may make errors due to not fully processing linguistic rules for a new language. The student's choice of words and arrangement are noted as being inappropriate, leading to a sentence with no semantic sense. Two references, Frisk (2014) and Radford (1999), are used to support this analysis.