Time Teacher Manual clock is a chunky and robust clock ideal designed to help children tell the time in 4 different ways with the help of double-sided cards. This manual clock is an excellent teaching tool that has a unique manual friction geared movement instead of a quartz one.Complete with 4 interchangeable time faces which enable children to progress from simple to more advanced time concepts. Double-sided cards for Arabic Numbers or Roman Numerals show: 12-hour numerals (1 to 12)24-hour numerals (13 to 24)Roman numerals (I to Xll)Words (five past to o'clock) This unique geared manual movement clock comes complete with a Teachers Activity Guide. The clock measures 28.5cm tall is tough and durable for hands-on use and makes an excellent teaching resource.