Here are the Scripture readings from the U.S. Catholic bishops website.
My own weekly study can be found here under "Current Study.
Reflections on the Sunday Scriptures to share with the younger ones in your family by Emily and Jeff Cavins can be found at Family Night .
You can read a great article on the Divine Trinity at the Rosary Light and Life page.
The Navarre Bible Commentary for each reading can be viewed here.
Further study resources for the Readings: St. Charles Borromeo Bible Study can be found here, and Catholic Matters can be found here.
Here is a Catholic Bible study podcast on the Gospel Reading, about an hour long, at Sunday Gospel Scripture Study. If you're traveling or have a lot of time on your hands, Fr. Benedict Groeshel did a great 13 part series on the Trinity for EWTN found here. Here also is the great Bishop Fulton Sheens classic talk, The Blessed Trinity.
Discussion and charitable comments are always welcome. Have a blessed week!