The BFL Symbols Project has the EDUFREE policy being completely applicable so you can use this project's materials, (downloads and webpage text), free of charge for educational purposes.
The basic idea behind the BFL Symbols project involves an attempt to realize how, if possible, symbols can be produced which each instil, as a result of being observed, a direct response in the mind of the observer so as to create a clearly definable awareness of a concept.
I am using a method to produce the symbols that involves the effort of mind to semi-automatically realize graphical components that arise from and are pertinent to a concept that is chosen before attempting to produce a symbol. Importantly, in this method, there is no desire to draw pictures of objects; the effort is to concentrate more on the abstract.
The project being published gives the opportunity for other people to agree or disagree and otherwise have opinion concerning my views within the project.