The use of notation for acceleration units, m/s/s is ambiguous (though it is
explained). A more appropriate notation is m/(s^2) or m/(s*s). The use of
g=10 m/s^2 as an approximation must be denoted every time the approximation is
used (for users external to Glenbrook).
Magnitude is usually defined as a positive quantity. The author states that "Scalars are quantities which are fully described by a magnitude alone." Scalars are described as having size and not direction, but scalars can be negative, so this statement can be misleading.
There are ambiguities in the definitions of speed. Speed is defined in general terms, and then the author carefully defines average and instantaneous speed. It is not clear how "speed" is related to average and instantaneous speed. The author defines "Average Speed - average of all instantaneous speeds....". It is unclear how to average instantaneous speeds (what are they averaged over?). Instantaneous speed is defined, but there is no indication of how one would calculate or measure it.
On the page which describes acceleration, a table labeled time and velocity only gives speeds in the velocity column.
When describing the various kinematics quantities and the kinematics equations,
the author leaves off reference to the initial velocity,
until the end summary,
where the appearance of that quantity is not explained.