Helpful hints Have the students practice using the stopwatch on other activities before using it as the time element of your experiment.
(Helpful hints; Have; the students practice using the stopwatch on other activities; T:before using it as the time element of your experiment) (students; using; the stopwatch on other activities)
Helpful hints students
Have using
the students practice using the stopwatch on other activities T:before using it as the time element of your experiment
the stopwatch on other activities