Some mathematical content runs throughout science at key stages
3, 4 and 5. It is worth remembering that good lessons in these
areas can indirectly benefit students in other subjects,
particularly if students are made aware of the connections in
lessons. The use of units is a key issue in science. Dimension-
ful answers should always be given with units (otherwise they
are meaningless). The ability to convert between units is
extremely important. nm and microns need to be recognised in Sc;
mm, m, cm, km need to be converted between. In Ma we use 1000 as
the usual conversion between adjacent units, recognising that cm
are an anomaly. In Sc converting periods of time is important,
eg to turn a number of minutes and seconds into a number of
seconds. In Sc this links closely with the conversion of units.
For example, MW (megawatts) are 106 Watts, nm are 10-9m, etc. In
Ma standard form tends to be introduced and used with reference
to measurements, for example to record very large distances
(solar system data) or v