If your answer differs from the key, don't just erase it. Analyze why the textbook version is correct. Is it a gender agreement error? A subjunctive trigger word you missed? A irregular verb conjugation?
Read the correct sentences aloud from the answer key. This builds muscle memory for proper sentence structure and pronunciation. Troubleshooting Common B1 Errors
Below is a of the type of content you can expect—note that we’re only showing a tiny excerpt (well under the 90‑character limit for quoted material) to illustrate the format:
“The ‘common mistakes’ section saved me from confusing por and para again.” — David L., B1 student
Some premium student codes unlock resources, including exercise solutions. The Teacher's Guide (Guía Didáctica)