This site is great practice for rules of divisibility.
This site offers a video lesson that shows place value through hundred thousands in a variety of contexts. There is also interactive practice, but all questions ask for the number with the greatest value, so activities targeting numbers with lower value need to be supplemented. This SLE is not addressed in Saxon.
This site lets kids measure and create rectangles to replace windows. To meet these SLEs, you'll need to have kids record their measurements and calculate the area and perimeter of each. They should also estimate first.
This is an awesome site for helping kids conceptually work through two-step problems. You can select multiplication, division, comparing, or part-whole.
A Maths Dictionary For Kids
This site lets students drag shapes to a grid and count the area. Perimeter could also be added.
This a game that can be played online and then at stations with the printable board game. I suggest asking students to record equations for both the way they thought about the problem and for their final factor pair with product.
You'll need to ask me to print a recording sheet for you to do this
This is a great site for teaching subtraction across zeros using base ten blocks. You can choose Create Your Own Problem. Be sure to click "start problem" before moving blocks so that the computer will show the borrowing in numeral form.
Use your place value skills to fire at a tank.
This site allows you to select the number of places, then students must compose a number by adding the value of each place. This would be great to use for expanded form practice.
A Math's Dictionary For Kids
Interactive perimeter site.
As kids play this game, push them to use this vocabulary.
As kids play this game, have them record factors and products on a recording sheet.
This is a great site for practice with this skill.
This is a great video lesson on weight and capacity.