The question is about resources to help singers work on rhythm away from rehearsal, without a keyboard.

 

Hindemith's Elementary Training for Musicians has never significanlty been improved upon.  That, plus a metronome, set to a relatively slow tempo, whose click is imagined as off-beats (either duple or triple) against which one taps or claps.  When imagined as triple, the metronome is clicking either the second or third part of the triplet while the singer taps or claps the beat.  And so on.

 

Best regards,

Jerome Hoberman

 

Music Director/Conductor, The Hong Kong Bach Choir & Orchestra

Starer - Rhythmic Training is a great book as well.

 

You may be interested in You've Got Rhythm: Read Music Better by Feeling the Beat, a complete rhythm-reading method I co-wrote with pianist/educator Joan Harkness. It incorporates simple gestures and text to integrate reading, speaking, and feeling the meter and rhythms. We have had rather amazing success with all ages. There's lots of information at http://fleap.com/YGR.html

Please feel free to contact me as well.

Anna