Below are the three most frequently requested resources that many students ask for.
VIDEOS
For a wonderful collection of videos including instructional Short Form with multiple views and narrations, as well as Push Hands, Boxing, and other videos, I highly recommend Content Galaxy, started by my classmate Steve Asherman. Subscriptions are available (click the Sign Up button) at a very reasonable cost. Videos with William C.C. Chen, Cheng Man-Ch’ing and other teachers are included. I am currently working on creating my own videos, which will be added to Content Galaxy.
BOOK
In addition to videos, I recommend the print book Brain Aerobics of Tai Chi Chuan, which matches well with what I teach. The book includes excellent annotated photos of the Short Form, and several worthwhile articles and other photos. The current Short Form that I teach has evolved a bit from those photos (taken 60 years ago), but they are accurate and helpful overall as a guide for the positioning, alignment, and connections.
TAI CHI CHUAN SHOES
The Yang-style Short Form has many slow turns, where excessive friction in footwear could interfere with the flowing movement. In addition, flexibility of footwear is important so as not to interfere with movement. For those reasons, I do not recommend sneakers or street shoes for practice. Socks can be adequate, but may be slippery or may allow cold or heat from the floor to distract the practice.
The best footwear solution is Tai Chi Chuan shoes, specifically with cotton soles. There are other, similar martial art shoes with vinyl or rubber bottoms, but I do not recommend them. Below are two links where I have successfully purchased multiple cotton-soled Tai Chi Chuan shoes for myself and others (I avoid Amazon for several reasons, including low-quality and counterfeit items):