It is expected that students will simplify and manipulate algebraic expressions as part of representing them in multiple ways. To be algebraically literate, students must be familiar with standard algebraic usage. When students complete homework assignments, have them exchange their work with a partner and check their partner's work for these problems.
Students demonstrate understanding by explaining the procedures they use to reach their solutions.
When students are adding and subtracting polynomial expressions, ask them to explain the conditions required before carrying out the operation. Look for evidence that students understand the concept of terms like and unlike . Have students generate a checklist of skills and procedures. On an ongoing basis have students use the checklist to identify, record, and analyse their errors. Based on their findings, have them develop plans to remedy areas needing improvement.