There are so many more resources. Feel free to look further into websites and to suggest others to add to this list. This is just a start...

Operations and Algebraic Thinking








Number and Operations in Base Ten

Place Value Quiz-like Questions
Gives students specific online questions on the areas they need for place value.



Measurement and Data

Time Quiz-like Questions
Great option for students to practice analog time online.
Counting Money
ABCya - students can play three levels of a counting money game
Time and Money
Practice with time and money.
Clockworks
Students practice telling time.
Telling Time
Mr.Nussbaum.com has games and worksheets to practice time.
Telling Time
Maths Zone has several telling time games.

Geometry

Geometry Worksheets
Worksheets for students to practice first grade geometry skills.
Worksheets
Geometry worksheets for first grade

Generic

View bookmarked resources through the Diigo list