since these will instructional bows, any cheap asian 3pc recurve will be fine, 35# is perfect for an adult, and 30# for a teenager. you want as long a set of limbs as possible. the riser wood and glass color has no bearing - holding weight, limb length and price are paramount.
you want the arrow to lie on the riser as close to the bow hand as possible, so ditch any stick-on elevated rest, put a velcro rug rest on the shelf and a piece of electrical tape as the arrow pressure plate. if the riser shelf isn't arc'd, put a 1/8" square piece of match stick or leather under the velcro rug right under the handle cut out, to allow hi-point for the arrow to ride on.
far, Far, FAR more important than the bow will be the arrow and it should be carbon, because alum and wood won't take beginner abuse all that well. four 500 spine arrows in 27", 28" and 29" lengths, each with 5" full helical feathers. have on hand screw-in field tips in 100, 150 and 200 grains.
that oughta do well for starters.