0A digital solution for your classroom with features created with teachers and students in mind: - Perpetual license - 24 hour, 7 days a week access - No limit to the number of students accessing one title at a time - Provides a School to Home connection wherever internet is available - Easy to use - Ability to turn audio on and off - Words highlighted to match audio How much water does it take to fill the fishbowl? How much milk do you need for your cereal? From cups to gallons, learn how measuring tools help you fill it up.