SMART software generally supports the export to IWB format, so it is likely you can export the *.notebook files from SMART Notebook to IWB. It is unlikely that you could perform this conversion with other software.
Convert SMART Notebook digital lesson to Common File Format.
We have found one software suitable in our database for this conversion.
Microsoft Windows software - convert notebook to iwb on Windows
SMART Notebook software sets the standard for creating, delivering and managing interactive lessons within a single application. All your lesson materials are right at your fingertips.
Convert from notebook file
to iwb file
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.