Since the overwhelming majority of games in 2A on down have playoff ramifications, I'm just going to focus on the three biggest classes.
Class 5A
#2 IC Liberty (6-1) at #10 Waterloo West (5-2)
#3 Pleasant Valley (6-1) at #14 IC West (4-3)
#4 WDM Valley (6-1) at #15 Ankeny (3-4)
#8 Johnston (5-2) at #19 Urbandale (3-4)
#11 Southeast Polk (4-3) at #5 Dowling Catholic (6-1)
#12 Ankeny Centennial (5-2) at #17 Waukee Northwest (3-4)
#16 CR Prairie (3-4) at #1 Bettendorf (7-0)
Class 4A
D1: Spencer (5-2/3-0) at Storm Lake (4-3/2-1)
D2: Western Dubuque (5-2/2-1) at Decorah (7-0/3-0)
D3: Clear Creek-Amana (4-3/2-1) at Xavier (5-2/3-0)
D4: Newton (5-2/2-1) at Gilbert (6-1/2-1)
D4: Pella (7-0/3-0) at Bondurant-Farrar (2-5/2-1)
D5: Indianola (4-3/1-2) at ADM (6-1/3-0)
D6: Norwalk (4-3/3-0) at Lewis Central (7-0/3-0)
Class 3A
D1: Sgt. Bluff-Luton (7-0/3-0) at SC Heelan (6-1/3-0)
D2: Webster City (3-4/2-1) at Algona (6-1/2-1)
D2: Humboldt (6-1/3-0) at Clear Lake (5-2/2-1)
D3: West Delaware (4-3/2-1) at Independence (5-2/2-1)
D4: Mount Vernon (6-1/3-0) at Washington (5-2/2-1)
D5: Williamsburg (6-1/3-0) at Grinnell (5-2/1-2)
D6: Creston (3-4/3-0) at Nevada (5-2/2-1)
D6: Harlan (4-3/2-1) at Atlantic (6-2/2-1)