Computer access
The teacher needs a computer to set and mark the student's work.
The students do NOT need access to a computer.
Contact time
For retrieval practice or spaced learning to work efficiently students should do their timely practice several times 
a week. This can be done in class or for homework.
Resources
The timely practice app includes
- an on-line "text book" (see the learning resources there is no need for a text book),
- revision aid (which uses good study skills rather than cramming)
- exam practice (which will be altered to suit the latest specifications and their interpretation by exam boards)
- record keeping system (which is in a form useful to aid best teaching and learning)
We have found frequency required tends to correspond to where learners fit in terms of the attainment spectrum of their peers.
e.g. learners below the lower quartile, (below the 25th percentile) need to do timely practice at least 3 times per week, with no more than 3 days gap between sessions e.g. Monday, Wednesday, Friday is ideal (where the gap Friday to Monday is 3 days, but e.g. Monday, Tuesday, Thursday will work for most learners. For those learners, where you find such a large gap won't work, can have an extra 5 minute practice scheduled, perhaps in a registration or with a parent or carer at the weekend.
e.g. learners between the lower quartile and the median (between the 25th and 50th percentile) can do timely practice twice a week, but three times is better. Again its the gap between sessions which is important. e.g. Monday and Thursday has gaps of 3 days and 4 days, this will usually work, but e.g. Monday, Tuesday has a gap of 6 days so is unlikely to work for some learners.