Here are the readings from the Revised Common Lectionary for next Sunday, the last Sunday after Pentecost

Isaiah 40:1-11
Psalm 85:1-2, 8-13
2 Peter 3:8-15a
Mark 1:1-8

http://www.library.vanderbilt.edu/divinity/lectionary/BAdvent/bAdvent2.htm

Denominational variations:

ACC: http://www.montreal.anglican.org/comments/badv2m.shtml
ECUSA: http://www.io.com/~kellywp/YearB/Advent/BAdv2.html
ELCIC: http://www.worship.ca/text/wpchb0506.pdf
ELCA: http://www.plu.edu/crel/wordlink/next-weeks.html
UCC: http://www.ucc.org/worship/samuel/s120405.htm
RCC: http://www.word-sunday.com/Files/B/2-Advent-b/A-2Advent-b.html

Collect (ECUSA):

Merciful God, who sent your messengers the prophets to preach repentance and prepare the way for our salvation: Give us grace to heed their warnings and forsake our sins, that we may greet with joy the coming of Jesus Christ our Redeemer; who lives and reigns with you and the Holy Spirit, one God, now and for ever. Amen.

Sunday-school Lesson plans:

http://www.sundayschoollessons.com/adv2les.htm (Corinthians)
http://www.sundayschoollessons.com/adv2kles.htm (Mark)

Younger Children: http://www.episcopalchurch.org/documents/Second_Sunday_of_Advent_Younger(1).doc
Older Children: http://www.episcopalchurch.org/documents/Second_Sunday_of_Advent_Older(1).doc
Adults: http://www.episcopalchurch.org/documents/Second_Sunday_of_Advent_Adults(1).doc

http://Logrus.ca/HomeChurchWeb/LectionaryStudy.html

Sunday-School Crafts:

http://www.sundayschoollessons.com/adv2kmart.htm ()
http://www.sundayschoollessons.com/adv2kart.htm ()
http://www.sundayschoollessons.com/advm2art.htm ()

http://www.sermons4kids.com/

Pew-work

http://www.efree.mb.ca/lectionarypuzzles/in-bwag.htm#ad2
http://Logrus.ca/HomeChurchWeb/Pewwork_adult.html
http://Logrus.ca/HomeChurchWeb/Pewwork_middleschool.html
http://Logrus.ca/HomeChurchWeb/Pewwork_elementary.html
http://Logrus.ca/HomeChurchWeb/Pewwork_preschool.html