Give immediate and constant feedback . Make every effort to help students remember math facts and math skills. Math thinking cannot occur without remembered math facts and skills. Constantly encourage students to practice their developing math knowledge. Repetition fixes knowledge in memory.
Instant recall is essential for basic math facts.
They have to achieve automatic use of such facts. Then their minds will be free to focus on the next level of math knowledge. Encourage students to speak and write, using mathematically correct language and symbols. Expect instant recall for basic math facts only . Don't make them think through a multi-step process in their heads.