Lesson details Key learning points Secure understanding of one more and one less using a variety of manipulatives and pictures.Use stem sentences including one more than and one less than.Keywords One more - The next number in the count is one more than the number before and there will be one more object in the set.One less - The previous number in the count is one less than the next number and there will be one fewer object in the set.Common misconceptionIncorrect sequence of counting when reca