Though your SLE requires that students develop an understanding of decimals through modeling. This could be a good way to develop this if they are allowed to represent the decimals with base ten blocks.
This activity allows kids to use the power of circles to find Digit. To meet your SLE, you'll need to be sure they're using the vocabuloary (radius and circumference). It is a great foundation for Euclidian Geometry that they'll experience in middle school.
This site will allow students to model perfect squares and other numbers.
This game allows kids to add decimals to tenths. They should note the equations they use to fill the gaps in the tracks.
This site has several links for helping kids practice the concepts and conversions of improper fractions and mixed numbers.
Use this site to practice.
This game can be used to practice finding the measures of center.
This is a great site for modeling decimals as well as addition and subtraction. Students should be allowed to use base ten blocks at their desks while strategies are modeled. Set the page to the desired number of columns and decimal places. Click create problem, drag manipulatives down, and click begin problem.
Students will need to have an understanding of the x and y axes on a cartesian plane in order to complete this activity. It's great for those who finish early and need a more rigorous assignment.
Use this site to practice.
In lesson 79, kids are asked to multiply fractions by 1 to find equivalent fractions. Unfortunately, there's really no visual conceptual understanding. This site is great for this because you can select a fraction for the first bar, then multiply the second by 3/3, the third by 4/4, etc.
This is a fun game for converting improper fractions to mixed numbers. Read the directions at the bottom of the page.
This site offers video lessons and an interactive game.
Click the hardest level for ordering decimals.
This is a good game for practice with ordering decimal numbers. You should preview it before you share it with kids, however, as Builder Ted's pants don't fit too well. When I used this with my kids we just talked about whether they could be mature about the British humor, and it wasn't ever a problem. Select Level 1 as 2 and 3 have negative numbers.
Mrs. Glossar's Math Goodies
Practice with Mode, Mean, Median, and Range here.
This movie gives good examples. Use your first name and last initial to log in. Don't ever put your last name on the internet without your parents' permission.
This is a great site for modeling decimals because it shows them broken down by place as you put them on a number line.
A Plus Math
This is great for these SLEs as well as a general geometry review.