Refresher training for ergonomics and safety voice will be developed to bolster concepts learned by apprentices in the primary training. This training will be delivered through text messages or emails. However, delivery may include Facebook or Twitter depending on participant preference. Secondary training is considered medium engagement learning since apprentices will be asked to respond to text messages or emails. Refresher training will be delivered four times a month over a one-year period to maximize knowledge retention [28, 31].