This Fluency Activity is a part of the Lesson 11, Unit 5, Grade 1. This activity prepares students for today's lesson, when they will be adding 5 minutes until they reach 30 minutes to connect half past the hour to 30 minutes past the hour. Display the chart. Students think-count to 20, saying multiples of 5 aloud. Hide the chart, and let students try to remember the sequence, counting slowly by fives to 20. Repeat think-counting and slowly skip-counting first to 25 and then to 30.