This is a 23-slide powerpoint which reviews, not teaches, numbers greater than 100. It shows a number (in digits) on the first slide. Then, the next slide will show the number as a word. So, teachers can have students use dry erase boards to write out the numbers and then they can check their answers when you show the numbers as words. Traditional pencil and paper work too! This pattern is continued throughout the 23 slides. This is a great pratice for quizzes or tests.