Most folks who celebrate Shavuot treat this feast as a one-day event, but I encourage you to read these devotionals one at a time, in order, from First Fruits (Day 1) all the way to Day 50. The first two links below will serve as an introduction to the concept, if you are new.
I hope these articles are a blessing!
First Fruits On Your Mark. Get Set. Grow.
Shavuot Day 2 Shavuot, The Original Pilgrim's Progress.
Shavuot Day 3 "You Shall Call His Name 'Yeshua'"
Shavuot Day 4 Mitzriam, Miriam, and Being Born Again
Shavuot Day 5 Righteousness Realized
Shavuot Day 6 The Key to Healing
Shavuot Day 7 The Spirit of a Fugitive
Exodus Chapter 16
Shavuot Day 8 Perfect Timing
Shavuot Day 9 Manna and Messiah
Shavuot Day 10 Testing, Testing, 1,2,3,4,5,6,7
Shavuot Day 11 Sabbath 101
Shavuot Day 12 A Shadow Of Things To Come
Shavuot Day 13 Keep My Sabbaths (Plural)
Shavuot Day 14 Thorny Breakthoughs
Exodus Chapter 17:1-7
Shavuot Day 15 Water From The Rock
Shavuot Day 16 Living Water
Shavuot Day 17 Two Kinds of Staves
Shavuot Day 18 Water From The Other Rock
Shavuot Day 19 Onward and Upward
Shavuot Day 20 Water and Light, Fountains and Eyes
Shavuot Day 21 In Disguise: Moses, Joseph, and Messiah
Exodus Chapter 17:8-17
Shavuot Day 22 The Name of Yeshua
Shavuot Day 23 Amalek!
Shavuot Day 24 HalleluYah
Shavuot Day 25 A Banner on a High Hill
Shavuot Day 26 Unhewn Stones. The Father and The Son
Shavuot Day 27 The Two Houses of Israel (...and Levi)
Shavuot Day 28 Highs and Lows
Exodus Chapter 18
Shavuot Day 29 The Biblical Justice System (Jethro's Advice)
Shavuot Day 30 The Holy Spirit and The Bride Of Messiah
Shavuot Day 31 Who Are The Kenites?
Shavuot Day 32 Gentiles, Sojourners, and Israel
Shavuot Day 33 The Power of Our Testimony
Shavuot Day 34 Torah, Mitzvah, Choq, & Mishpat
Shavuot Day 35 Steadfast Love: Going With The Flow
Exodus Chapter 18
Shavuot Day 36 The Wilderness
Shavuot Day 37 The Number 3: Perpetual Life in Messiah
Shavuot Day 38 Yah's Special Treasure (aka Israel)
Shavuot Day 39 Darkness, Fear, and Dread: Yah's Modus Operandi
Shavuot Day 40 "Ascension Day" -- A Time of Testing and the #40
Shavuot Day 41 The Ten Devarim (The Ten Commandments)
Shavuot Day 42 The Hidden Allegory of "Bar"
Shavuot Day 43 Holy Ground
Shavuot Day 44 A Primer to "The Book of The Law"
Shavuot Day 45 Biblical Slavery
Shavuot Day 46 The Three Pilgrimage Feasts
Shavuot Day 47 The "Real" Promised Land
Shavuot Day 49 Tablets Made of Sapphire
Shavuot Day 50 Tzit-Tziot and the Seventh Day Sabbath