This document analyzes two online performance-based assessment instruments according to principles of assessment. It summarizes Lyricstraining, a site for L2 music listening practice that assesses pronunciation and vocabulary through song transcription and karaoke. It fulfills validity, practicality, authenticity, reliability, transparency, and security. The document also summarizes Zunal, a site for creating Webquests that develops autonomy and language skills. Zunal fulfills practicality, authenticity, validity, and reliability according to principles of assessment.