This looks like it may work for making oral presentations of WebSlide collections, if you upload a voice recording for Background Music. You'd have to carefully time your recording (or post-production audio track) to match the Play Settings. Time adjustments shouldn't be too difficult in a program such as Audacity.
Use crosswords to review vocabulary and lessons for all subjects. Students may
actually even enjoy doing the assignment! Crossword puzzles encourage
logical thinking and correct spelling. Crosswords can be printed or uploaded to
your website.