This table has lots of rows. After scrolling down to the point where the headers are no longer visible, the user could very easily get the columns mixed up. This is because the headers appear only once in the table.
Name Knows HTML? Knows CSS? Knows LESS? Knows Sass? Knows JavaScript? Knows jQuery? Knows PHP? Knows Python? Knows Ruby?
Selena Sevier Yes No Yes Yes Yes Yes No Yes Yes
Jami Eisner Yes No Yes No Yes No Yes Yes Yes
Penelope Showman Yes Yes No Yes Yes Yes Yes No Yes
Karina Whitelow Yes No Yes No Yes No Yes No Yes
Kurt Savino Yes Yes No Yes No No Yes No No
Katy Stell Yes Yes No Yes Yes No Yes No Yes
Jamie Maxton No Yes No Yes No No No No Yes
Neil Jepsen Yes No Yes No Yes No No No No
Guy Delgiudice Yes No Yes Yes Yes Yes No Yes Yes
Clayton Alan Yes No Yes Yes Yes Yes No Yes Yes
Nita Inge Yes Yes Yes No Yes Yes No Yes Yes
Fernando Hockensmith No Yes Yes No Yes No Yes No Yes
Kurt Burpee Yes Yes Yes No Yes No Yes No No
Erik Arzate Yes Yes Yes No Yes No Yes Yes Yes
Ashlee Valez No Yes No Yes No No Yes No Yes
Javier Bryner Yes No Yes No Yes No No No Yes
Tia Clutts No Yes No No No Yes Yes No Yes
Melisa Deady No Yes Yes No Yes Yes No Yes Yes
Julio Heffern No Yes No Yes Yes No Yes No Yes
Darcy Cockrum No Yes Yes Yes No Yes Yes No No
Odessa Brunett Yes No No No No No Yes Yes Yes
Malinda Suydam Yes No Yes No No Yes No Yes No
Guy Queener No No Yes No Yes No No No Yes
Malinda Mullan Yes Yes No No Yes No No Yes No
Guy Bubb Yes Yes No Yes No Yes Yes Yes No
Cody Godbout Yes Yes No Yes Yes No Yes Yes No
Max Pastorius Yes Yes No Yes No Yes No No No
Darren Dudding Yes No No Yes Yes No Yes No No
Penelope Crupi Yes Yes No No No Yes Yes No Yes
Earnestine Grana No No Yes No No No No No Yes
Mathew Laford Yes No No Yes No No Yes No No
Pearlie Callaham Yes No Yes No No No No Yes No
Ted Currence Yes Yes No Yes Yes No Yes Yes No
Zelma Balfour Yes Yes No No No No No Yes Yes
Saundra Cayton Yes Yes No Yes No Yes No Yes No
Karina Hege No No Yes No Yes No No No No
Darryl Chagolla Yes Yes No Yes Yes Yes No Yes Yes
Lonnie Mcgreevy Yes No Yes Yes No Yes Yes No Yes
Kelly Smullen Yes Yes Yes Yes Yes Yes Yes Yes Yes
Fernando Monda No Yes No Yes Yes No Yes No No
Darryl Seamans No No No Yes Yes Yes No Yes No
Allan Borton Yes Yes Yes No Yes Yes Yes No Yes
Selena Danziger Yes No Yes Yes No No Yes No Yes
Gay Dan No Yes No No No No Yes No Yes
Loraine Demmer No Yes No No Yes No Yes No Yes
Earnestine Wachowiak No No Yes Yes Yes No Yes Yes No
Erik Spafford Yes No Yes Yes Yes No No No No
Julianne Bausch No Yes Yes No Yes No Yes No Yes
Christian Goto No No Yes Yes No Yes No Yes Yes
Allan Pokorny No No No Yes No Yes Yes No Yes

Names generated with The Random Name Generator.