As a math teacher I always encounter students who struggle with computation fluency. Number talks are a great way to increase automaticity. Number Talks are short equations that students are asked to solve mentally. They should be done daily and done alongside the current curriculum. Teacher should spend between 5 and 10 minutes on each session. My students love doing them. My number Talks precede the daily lesson and it helps with transition. Students are eager and are focused right away. Give it a try !!!
Clink links below for an article on Number Talks.
Clink link for a list of number talk for daily use.