Practice and strategy
use words like one more, and one less. This will help with
Students need to know times tables.
Teach in this order: 0's, 1's, 2's, 5's, 10's, 11's, then doubles, ex 3x3
Also teach that 2x3 is the same thing as 3x2
After Mastering the above numbers, they have 16 to memorize.