In this video I use the command line interface to batch convert Appleworks/Clarisworks files to docx and xlsx files using LibreOffice.
Mac Example
find ./ -iname '*.cwk' -execdir /Applications/LibreOffice.app/Contents/MacOS/soffice --headless --convert-to xlsx --outdir ./ {} \;
Linux Example
find ./ -iname '*.cwk' -execdir soffice --headless --convert-to xlsx --outdir ./ {} \;
Change xlsx to docx for word processor files.