1. a <i>large amount of</i> source <i>Information</i> (about 7,000 teaching hours - for replication, total - more than 20,000 teaching hours).<br>2. <i>a large number of</i> submitted <i>Courses</i> and <i>Projects</i>.<br>3. a <i>number of terms</i> - fundamentally new.<br>4. <i>many terms</i> - its own, not generally accepted meaning.