Multiplication.com has some really good self-correcting quizzes for math facts.  It allows students to take quizzes with visual hints or without them.  Students can practice math fact fluency for specific math facts that they might be struggling with.  When a student is finished it can even print out an image of how well they did.

Here are other links to 

3rd-grade students practice telling time using this worksheet.  There are 9 clocks where students have to either draw the clock face or write down the time that a clock is showing.  There is also 4 subtraction across zeros using 3 digit numbers as a review.

Meet Skip the Squirrel.  Students solve 6, 3 digit subtraction questions to find out which color students will color in the picture with.

In this worksheet, students will review adding three digits together as well as adding three double-digit values together.  It comes with a nice pun about rabbits.

Students complete the 0 to 10 addition and each answer is given a "color" value.  The student color in the square the result is a lion.  Check out some other coloring math squares here.

This is a random three-digit subtraction generator that is

Smartboard friendly, with big buttons. Click the reset values button and the program will generate two 3-digit numbers that students can use to reinforce their ability to subtract.  I use this program to generate subtraction questions and students can use whiteboards to solve the answer.  This can also be used to play games like king of the row or relay races.

Use this elementary math worksheet to check for understanding or reteach the triple digit subtraction with borrowing numbers.

This worksheet allows students to sort addition solutions into odd or even categories.

Practice your tens and ones place value with your students using this "Loopy" game.  Cut out the cards and distribute them to your students.  Each card should ends with "Who am I."  If done right all of your students would have a chance and answering a question and playing the game.