AYSC Developmental Drills Package
AYSC has prepared a package of practice drill ideas for coaches, available as a PDF (14 MB).
Sub Sheet
A simple printable sub tracking sheet is available (PDF) that can help coaches to track which players are playing (or have played) in which position(s) over the course of a game.
Websites
PDFs
Google Search
There are literally thousands of websites offering free coaching information – a quick Google search will lead you to hundreds of free drill ideas and coaching strategies for every level.