Coaches like to refer to them as "teaching points."
 That can also be a euphemism for yelling at players.
 Redshirt freshman cornerback Otis Merrill has got to experience a lot of those moments this spring and he had another one during Tuesday night's practice under the lights inside Camp Randall Stadium.
 Merrill made the mistake of giving up on a play, which turned into a long completion to Maurice Moore. That led to Merrill getting yelled at by several defensive coaches, as well as Bielema.
 "Otis has got a lot of gifted talents, just because of the way he was made," Bielema said. "He's had a tendency to slack off at the end of plays. He was on a man route there, he got picked and basically just gave up on the play.
 "I said, `Next year, we're playing Michigan, you get picked, you can't give up in front of 80,000 people. If you're going to do it, you're not going to do it on this field. Jog two laps and get back in there.' "
 Bielema admitted singling out a player and making him jog a couple laps is done to "embarrass him."
 "We're not (doing it for) conditioning," Bielema said. "It draws attention to yourself. Obviously, when everybody else is standing, they're cat-calling him when he's jogging around. It's not an enjoyable experience."
 It's similar to what receivers have done in some recent practices, when they have jogged alone to the end of the field after dropping a pass.
 "I like reinforcement for negative actions," Bielema said. "I like positive reinforcement (also). I like the way our defense swarms when we make an interception.
 "But I think negative reinforcement, especially with younger players, I want them to know they just messed up. One of my greatest memories, when I was at Kansas State, (a player) dropped a ball and did five up-downs during a game. That was conditioned in him. I think it holds them accountable, so they don't (think), `Aw, I messed up,' clap their hands and go in the huddle."
 The Badgers got several injured players back, as expected, but did lose sophomore wide receiver Kyle Jefferson, who suffered a cut on his leg, which required stitches, while running down a hall on Monday night. That will cause him to miss the spring game on Saturday.
 "Typical in (this) spring, I don't know why he was running down the hallway," Bielema said. "He ran into a concrete thing that was off on a wall and just gashed his leg wide open. There are six or seven stitches, but nothing structurally (damaged). He can't go until he gets those stitches out."
 Defensive end O'Brien Schofield practiced well, despite wearing a large wrap to protect his broken right hand, batting down a couple of passes. Linebacker Blake Sorensen also returned while wide receivers Nick Toon (hamstring) and Xavier Harris (back) took part in individual drills but were not cleared for the team portion.