OWINGS MILLS, Md. – School’s out, but this is hardly the time for any final grades when it comes to the development of Lamar Jackson, the transitional quarterback of grand visions.

The Ravens wrapped up their mandatory minicamp on Thursday with the second-year pro unleashing a perfectly timed dime on a deep corner throw one minute, then delivering a head-scratching pass into the dirt on the other side of the field the next.

Young quarterbacks: so much promise, so much room to grow. Jackson’s inconsistency is typical in many regards for a player at this point on the NFL learning curve. Yet given his team’s bold gamble in bucking the conventional model at the position, few have drawn the level of scrutiny that Jackson has during his offseason lab work.

“It don’t really matter,” Jackson told USA TODAY Sports during a quick hallway chat outside the locker room. “Just win games. That’s what it’s all about.”

Jackson quickly proved he can win in the NFL. After Joe Flacco was sidelined with a hip injury midway through last season, he sparked the Ravens to a 6-1 mark in seven regular-season starts. That run not only gave Baltimore its first AFC North title since 2012, but it probably saved coach John Harbaugh’s job.

But with 147 carries, Jackson also ran more than any quarterback in NFL history. A quick comparison: When Michael Vick rushed for a career-high 1,039 yards in 2006, he ran 123 times.

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Jackson’s dashes offer great evidence of his ability to keep plays alive, to spring big gains and keep defenses off-balance. And it is precisely the X-factor the Ravens knew they were getting when they traded back into the first round last year to snag the Louisville product with the No. 32 pick.

Can the success last? That’s still an essential question when pondering the pain factor of running as a quarterback. Harbaugh undoubtedly plans to build around the ground threat with the idea emboldened by the offensive coordinator choice of Greg Roman, who replaced Marty Mornhinweg.

It was Roman who pushed the buttons when Colin Kaepernick had his greatest success as the 49ers quarterback. Now he is charged with building a system around Jackson.

“We were aligned in the vision,” Harbaugh told USA TODAY after Thursday’s practice, when asked why he made the switch to Roman.

Still, for the vision to work, Jackson must complement his breathtaking runs with lethal passing – consistently. Yet whether the Ravens can become a legitimate AFC title contender again this season will hinge on the potential progression for Jackson after an entire offseason to work in a new system that Roman crafted specifically for the mobile quarterback.

On top of that, rookie-year lessons loom. Jackson tied for the NFL high last season with 12 fumbles, which seems even more problematic when considering the other three quarterbacks he tied for in that category – Dak Prescott, Derek Carr and Jared Goff – started the entire season.

The Ravens will also need to be versatile enough to react to opponents who are better prepared for Jackson the next time around. The Chargers can vouch for that, having ousted Baltimore in the playoff opener by keeping Jackson’s running contained much more comfortably than they did two weeks earlier. On paper, the Ravens seem better equipped for versatility. They signed free agent running back Mark Ingram of the Saints and drafted Oklahoma speedster Marquise Brown as a deep receiving threat.

Yet so much will come down to Jackson’s throwing. In the five weeks before the start of training camp, he will work with his private quarterback coach, Joshua Harris, and might consult another in Tom House to work the fundamentals.

“Footwork,” Jackson said. “Shoulders. Hips. You know, quarterback work.”

Last season, Jackson completed 58.2 percent of his throws, but his six scoring strikes for the year equated to, well, a good game for Patrick Mahomes.

It’s no wonder that Jackson summarizes the goal for personal growth – and, it can be reasoned, for making the grade – as such: “Scoring points. Not relying on our defense to win games.”

Roman built a new playbook from scratch and in talking to reporters this week hailed the collaborative input from other coaches. Creativity can be a game-changer, too, especially when there’s a special athlete like Jackson to inspire the brainstorming.

Then there’s the process of bringing the playbook to life. Jackson has a new language as Roman overhauled the terminology. Gone are elongated, 25-word play-calls. The new calls, some for the same old concepts, are quick and snappy. Harbaugh called it “purposeful” when describing the systematic process of fitting the elements together.

Maybe that’s why Marshal Yanda, the offensive line's linchpin, pointed to Jackson’s command in the huddle as the most noticeable difference during the offseason.

“Yeah, because last year there were games when I wasn’t in command,” Jackson said. “I’d come in last year kind of nervous, because there are grown men looking at you, depending on you to help them feed their family.

“Now I’m a lot more comfortable just saying different things on different plays to let my guys know where they need to be.”

That’s one measure of growth, which may be partly traced to experience, but also to the added comfort level with streamlined terminology.

As Harbaugh puts it, “In order for it to make sense, you have to organize it.”

The coach is way past wondering whether they can succeed with Jackson as the unconventional answer in place of the classic dropback passer. The Ravens were all-in when they drafted Jackson. Now it’s a matter of giving their vision the best chance to succeed.

Follow Jarrett Bell on Twitter @JarrettBell.