Group instruction is the most common delivery method of motor skill training given its cost and time effectiveness. This
is also the case during rehabilitation where therapists divide their attention among several patients. Compared to
dedicated one-on-one instruction, group instruction often suffers from reduced quality and quantity of instruction and
feedback. Further, during rehabilitation programs, patients struggle outside of therapy sessions given the lack of
instruction and feedback found only during clinic visits. We propose a wearable, low-cost motion sensing and actuation
system capable of providing real-time vibrotactile feedback for trainer-defined goal movements and repetitions. The
trainer inputs movement goals for the user, and adapts these values (joint angles, movement speeds) over time for
continued progress. In this paper, we present a novel second generation design, and introduce a flexible vibrotactile strip
to overcome construction challenges of these types of systems. The flexible display is constructed using commercial
LED strips that have been modified by attaching pancake style vibration motors. The flexible display does not require
external microcontrollers to enable or disable motors, and may allow these systems to be expanded to the whole body.
We also summarize two previous studies that have assessed appropriate body sites and pattern designs for vibrotactile
motor instructions and feedback signals.