Are you ready to take the TEKS Challenge? This free app by Pearson Education provides test questions as practice for the Texas STAAR Science exam with each question aligned to the Texas Essential Knowledge and Skills (TEKS) standards. Questions span grades K-8 science and High School Biology, Chemistry, and Physics courses. Students and teachers can access a variety of warm-up questions, timed test questions, and key vocabulary terms in both English and Spanish. After taking the practice or timed tests, students can email the results to their teacher, parent, or friends.