Let me add to what Donje said, start with having everyone, including Maintenance, take Fair Housing classes. You might also consider The Training Factor in addition to Grace Hill for on-line training classes. Each of these providers offer specialized training packages you can consider that is effective and easy to use for the leasing consultants and easy for you to keep track of everyone's progress.
Second, Leasing Professionals must embrace every aspect of the sale, from the first phone call, email lead, and walk-in Prospects. It sounds like you have traffic, your question is how to close. I suggest doing some role playing scenarios with all the leasing team members and ASK THEM what they are having problems with. Maybe they freeze when Prospects ask certain questions or make an objection: rooms are too small, not enough storage (but your community offers garages), not the "right" community amenities (fitness center, pool, don't accept pets, etc.) or dated apartment decor. Some of these you can "fix" and some you cannot, but your leasing team can learn to turn a negative into a positive, but it takes preparation and practice which leads to confidence.
You might consider your property's marketing plans and materials, too, as a contributing factor. Maybe these materials need updating. Additionally, I would want the leasing consultants to understand the art of the tour, as well. All of this helps the leasing consultant feel "polished" and confident.
Some good closing techniques include, asking Prospect when they would like to move in because if they aren't ready today perhaps they would be interested in preleasing an upcoming vacant? Also, NEVER let a Prospect know how many vacant units you have, so don't display the Make Ready Board to them. Build excitement for the Prospect and make them feel special - "May we hold this apartment for you? Holding is such an easy process. Let me get your paperwork started!" Or, "I have this apartment today, and you really seem to love it. It fits everything on your Wish List! How great is that? Here is the Application. Would you like to fill it out now?"
Rapport needs to be built and this happens with a good conversation between your leasing consultants and the Prospects. Once likeability occurs, trust can begin. All relationships are built on trust. For those Prospects who are analytical, you might get a piece of paper and a calculator out and start comparing prices, etc. and build the idea of the value they will receive by renting here on this day. I always ask permission of a Prospect to show them this. People appreciate a helpful attitude, not a pushy one.
Last of all, make sure your leasing consultants believe in the community with all their hearts. Their enthusiasm and confidence will relate very well with the Prospects.