Your Science teacher will tell you not to memorize formulae, but learn to recognize the concepts when expressed in an equation. Usually we begin learning general scientific concepts in junior high (middle school? Fifth Form?) in scalar terms (no direction). Consider,
d = v * t
F = m * a
W = F * d
v = a * t
Recognize any of these? Remember, at this stage there is no sense of direction, just the basic relationships.
What does rate times time give? What does acceleration * times time give? What does force times distance give? What does mass times accelertion give?
See what I mean? Focus on the concepts and how they relate, and you will easily remember what their relationship defines.