I am new to teaching third grade and we have just begun implementing the Common Core. I have one week to get in a good foundation of fractions before the end of the quarter (and the assessment). Does anyone have suggestions for the biggest bang for your buck in lesson plans, virtual manipulatives, or any free resources that can help me best word my definitions for the students and bring them to a basic fundamental understanding of fractions (Common Core 3NF).
Thinkfinity has many resources available through its content partners to teach fractions. Illuminations is our content partner specifically geared toward mathematics.
If you go to the homepage of the Thinkfinity Community and use the Keyword search feature on the right under the heading Thinkfinity Resources, you can locate many lessons, manipulatives, esheets, etc. on fractions. Just put the word fractions in the keyword search box and do not select a grade level or subject area. Then click on the red Search box and you will find 24 results that may have possibilities to use in reviewing your students before their final quarterly assessment.
You also can try the State Standards search under the Thinkfinity Resources heading. Scroll through the state standards listed and then you will find the state common core standards. Select a grade level and subject area to locate Thinkfinity resources specific to your standard.
Please share with us what you find that is useful so that others can benefit from your suggestions for teaching fractions.
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My favorite math manipulative for fractions is http://illuminations.nctm.org/equivfrac. (That URL will take you to a version for desktops, laptops, and mobile devices, depending on what you're using.)
I also like Illuminations: Fraction Models, but you'll have to decide if this is appropriate for your students. It might be at a slightly high level for 3rd-grade students who are just learning fractions.
I also think Illuminations: Fun with Fractions would be a good lesson for you to use, especially for 3.NF.A.1.
And Illuminations: Fractional Clothesline is a fun classroom activity that helps kids understand fractions on a number line.
I hope those help! Fractions are tough, and I don't envy you having to get kids to understand them in just a week... good luck!
Online Projects Manager, NCTM