The worksheets are in sets of 4 sheets for each separate table, and
intended to be used in these sets to allow children to take easy steps from
one stage of learning to the next. There are 144 questions for each table, on
each set of four sheets, and if the child starts at the beginning, s/he should
be able to work out "what comes next" at each stage.
The first four sheets (the "1 times table") will not be necessary for most
children, but very "early learners" may find it useful for writing practice. It
is recommended that the Key Stage 1 addition worksheets
be completed easily by the child (with further practice of more complex addition) before any of the times tables worksheets
are first used.
It's recommended also that children take the tables in gradual stages,
certainly not more than one per week, and maybe start with the four
practice sheets for the 10 times table (which is very straightforward)
before moving on to the 2 times table [the 10-multiples are used in early
steps within each practice format, so it can be constructive to tackle these
first].
For the very first attempt at any given table, it may be found most helpful
to go through the questions aloud, first of all, letting them make one easy
step at a time, so they become confident in their ability to "work out the
answer" in their heads - presenting the set of four worksheets the next
day, when the table is still fresh in their minds - or, depending on the child,
it may be better to go through the questions aloud on several successive
days, leaving the set of 4 written worksheets for that table until the end of
the week.