Are you looking for an easy to use, effective online assessment tool? Socrative.com might just be exactly what you've been searching for. Socrative allows you to create multiple choice and constructed response questions with ease. Students find the assessment by typing in a simple access code, and their answers are immediately available for the teacher to view. The access code makes the assessment synchronous (definitive start and stop times). Multiple choice questions can be graded and scored automatically, while constructed response questions can viewed and teacher-scored. Try out the Space Race option for a fun, formative assessment competition. Socrative is free and linked with Google.