Cut-out units, rods of ten and flats of one hundred at 1 cm or 0.75 cm a unit, on one mixed page or filled with a single piece.
Base-ten blocks make place value concrete: ten units make a rod, ten rods make a flat. Students build and trade numbers by cutting and gluing the blocks.
Print on coloured card, one colour per piece, so a rod is never mistaken for a row of units. Keep one mixed page per pair of students.