Average speed is total distance over total time. This can be represented in a distance time graph, where speed is equivalent to the gradient of the graph.
Velocity is the speed of a body in a given direction. Therefore it changes (accelerates - or +) if the speed or the direction changes. Acceleration is the change in velocity over time.
Acceleration is measured in m/(s^2)
The slope of a velocity time graph is the acceleration and the area underneath the graph is the distance.
Speed is a scalar quality whereas Velocity is a vector quality, fill in the blanks:
