Taya
This is my Grade 2 Lesson 1 lesson. Actually I cheated and used it for Grade 3 too.
It worked with my horrible Grade 2 who arrived fully evil in Grade 1 and don't seem to have matured during the break. It also worked with my Grade 3 who have been adorable and willing but hard to get speaking since Grade 1.
I haven't had time to write out a lesson plan so I'll describe anything that isn't obvious from the ppt - and thanks to all the others that I've scavenged bits from too.
Here goes - Ask the class if anyone did anything interesting during break (doesn't matter if just one or two or none volunteer an answer.)
Tell them that by the end of the lesson they WILL all be able to tell you about their winter break.
Remind them that if they are talking about the past, they have to use past tense. Elicit the past tense of the verbs on the slide. Get them all to shout it out.
Tell them that first you will tell them about YOUR vacation (probably need to change a few pictures here).
Now show them the conversation and remind them that they WILL be able to have this conversation by the end of the lesson. Demonstrate it with an able student or a co-teacher. Speak fairly quickly and naturally.
Show them the first (simple part) of the conversation and get them to chant it.
Tell them that they now have to prepare 5 things they did over the vacation. I printed a simple A5 sheet with a grid and prompts; either 'did you go anywhere special?' and a space or, for lower ability 'I went to.....''
Give them 5 minutes (timer on screen) to complete.
Now tell them that they are to come to the front in pairs and read out their conversation, adding 3 things from their lists. The fastest conversation will win a prize (stickers, sweets, points, whatver works for you)
Set a timer (I use Cool Timer - free download) and time the conversation.
Get the first volunteers up to the front and write down the score time when they are done.
The next volunteers should be more willing to come forward to beat the time.
The rest of the class will finish their table of 'what I did during vacation' just in case the find the courage to get up there and compete

Carry on till the end of the lesson - I find somewhere between 10 and 15 minutes is enough before it gets old.
Hope it's of some use.