Tandoku Undo means “Individual practise”. In Tomiki/Shodokan aikido this commonly refers to Unsoku (foot movements) and Tegatana Dosa (Hand blade exercises).
At last night’s training, I was asked for some Youtube videos that would be a good reference. After sifting out some poor videos (with mistakes made such as keeping the heel off the ground), I settled on these two videos as good examples.
Unsoku (Sean Flynn)
Tegatana Dosa (Scott Allbright)