Level: Easy Course description: An easy introduction to mental math with the rapid skill of multiplying by eleven.
Skills: Addition
Level: Hard Course description: Guide to squaring any two-digit integer with three-digit numbers as a bonus.
Skills: Multiplication, Addition
Level: Hard Course description: Learn to multiply any pair of two digit or three digit numbers in a visual manner.
Level: Hard Course description: Explore the art of easily calculating the day of the week of any date.
Skills: Memorization, Addition, Multiples
Level: Easy Course description: Review basic divisibility rules and discover how to test divisibility by any number.
Skills: Multiplication, Subtraction, Multiples
