Well, if your preschool says you need lesson plans for toddlers, than yes, that means you need lesson plans, lol. Geesh. Some people think they know everything, lol. :)
Try searching on www.perpetualpreschool.com for plans or links to them. Also preschoolrainbow is another good resource. But the perpetualpreschool one is terrific and you might find another resource or more on that site.
Also, it is not hard to make one of your own--just do a search on your Word or Works system on your pc and make a chart--the search or help option will show you exactly how to do it. It's a cinch, and you'll get kudos for creating your own customized plan for your center. Trust me, it's easy!
Good luck, and have fun with those tod's! They are full of fun and there is so much to love about doing activities with them, especially if you have the right supports in place.